Home / 287,234.10-431,045.55-129,381.30

Finding the Fourth Proportional to 287,234.10, 431,045.55 and 129,381.30

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Solution

The fourth proportional to 287,234.10, 431,045.55 and 129,381.30 is: 194,159.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,234.10 : 431,045.55 = 129,381.30 : x
  2. Step 2: Convert to fraction form
    287,234.10/431,045.55 = 129,381.30/x
  3. Step 3: Cross multiply
    287,234.10x = 431,045.55 × 129,381.30
  4. Step 4: Simplify right side
    287,234.10x = 55,769,233,618.22
  5. Step 5: Solve for x
    x = 55,769,233,618.22/287,234.10
  6. Step 6: Final answer
    x = 194,159.52

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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.