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Finding the Fourth Proportional to 287,700.45, 431,535.07 and 88,020.80

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Solution

The fourth proportional to 287,700.45, 431,535.07 and 88,020.80 is: 132,026.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,700.45 : 431,535.07 = 88,020.80 : x
  2. Step 2: Convert to fraction form
    287,700.45/431,535.07 = 88,020.80/x
  3. Step 3: Cross multiply
    287,700.45x = 431,535.07 × 88,020.80
  4. Step 4: Simplify right side
    287,700.45x = 37,984,062,089.46
  5. Step 5: Solve for x
    x = 37,984,062,089.46/287,700.45
  6. Step 6: Final answer
    x = 132,026.43

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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.