Home / 287,298.06-431,132.97-129,516.90

Finding the Fourth Proportional to 287,298.06, 431,132.97 and 129,516.90

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Solution

The fourth proportional to 287,298.06, 431,132.97 and 129,516.90 is: 194,359.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,298.06 : 431,132.97 = 129,516.90 : x
  2. Step 2: Convert to fraction form
    287,298.06/431,132.97 = 129,516.90/x
  3. Step 3: Cross multiply
    287,298.06x = 431,132.97 × 129,516.90
  4. Step 4: Simplify right side
    287,298.06x = 55,839,005,762.19
  5. Step 5: Solve for x
    x = 55,839,005,762.19/287,298.06
  6. Step 6: Final answer
    x = 194,359.15

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1.5x scale

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.