Home / 142,347.02-196,431.21-78,681.02

Finding the Fourth Proportional to 142,347.02, 196,431.21 and 78,681.02

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Solution

The fourth proportional to 142,347.02, 196,431.21 and 78,681.02 is: 108,575.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,347.02 : 196,431.21 = 78,681.02 : x
  2. Step 2: Convert to fraction form
    142,347.02/196,431.21 = 78,681.02/x
  3. Step 3: Cross multiply
    142,347.02x = 196,431.21 × 78,681.02
  4. Step 4: Simplify right side
    142,347.02x = 15,455,406,980.48
  5. Step 5: Solve for x
    x = 15,455,406,980.48/142,347.02
  6. Step 6: Final answer
    x = 108,575.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.