Home / 429,146.91-643,836.47-129,637.26

Finding the Fourth Proportional to 429,146.91, 643,836.47 and 129,637.26

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Solution

The fourth proportional to 429,146.91, 643,836.47 and 129,637.26 is: 194,490.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,146.91 : 643,836.47 = 129,637.26 : x
  2. Step 2: Convert to fraction form
    429,146.91/643,836.47 = 129,637.26/x
  3. Step 3: Cross multiply
    429,146.91x = 643,836.47 × 129,637.26
  4. Step 4: Simplify right side
    429,146.91x = 83,465,195,210.69
  5. Step 5: Solve for x
    x = 83,465,195,210.69/429,146.91
  6. Step 6: Final answer
    x = 194,490.96

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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.