Home / 142,019,986.30-213,029,979.45-81,553,810.30

Finding the Fourth Proportional to 142,019,986.30, 213,029,979.45 and 81,553,810.30

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Solution

The fourth proportional to 142,019,986.30, 213,029,979.45 and 81,553,810.30 is: 122,330,715.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,019,986.30 : 213,029,979.45 = 81,553,810.30 : x
  2. Step 2: Convert to fraction form
    142,019,986.30/213,029,979.45 = 81,553,810.30/x
  3. Step 3: Cross multiply
    142,019,986.30x = 213,029,979.45 × 81,553,810.30
  4. Step 4: Simplify right side
    142,019,986.30x = 17,373,406,532,278,196
  5. Step 5: Solve for x
    x = 17,373,406,532,278,196/142,019,986.30
  6. Step 6: Final answer
    x = 122,330,715.45

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.