Home / 287,631.20-431,446.80-130,167.20

Finding the Fourth Proportional to 287,631.20, 431,446.80 and 130,167.20

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Solution

The fourth proportional to 287,631.20, 431,446.80 and 130,167.20 is: 195,250.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,631.20 : 431,446.80 = 130,167.20 : x
  2. Step 2: Convert to fraction form
    287,631.20/431,446.80 = 130,167.20/x
  3. Step 3: Cross multiply
    287,631.20x = 431,446.80 × 130,167.20
  4. Step 4: Simplify right side
    287,631.20x = 56,160,221,904.96
  5. Step 5: Solve for x
    x = 56,160,221,904.96/287,631.20
  6. Step 6: Final answer
    x = 195,250.80

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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.