Home / 143,239.78-197,465.61-100,666.18

Finding the Fourth Proportional to 143,239.78, 197,465.61 and 100,666.18

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Solution

The fourth proportional to 143,239.78, 197,465.61 and 100,666.18 is: 138,775.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,239.78 : 197,465.61 = 100,666.18 : x
  2. Step 2: Convert to fraction form
    143,239.78/197,465.61 = 100,666.18/x
  3. Step 3: Cross multiply
    143,239.78x = 197,465.61 × 100,666.18
  4. Step 4: Simplify right side
    143,239.78x = 19,878,108,640.07
  5. Step 5: Solve for x
    x = 19,878,108,640.07/143,239.78
  6. Step 6: Final answer
    x = 138,775.06

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1.5x scale

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.