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Finding the Fourth Proportional to 83,689.80, 125,534.70 and 28,285.80

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Solution

The fourth proportional to 83,689.80, 125,534.70 and 28,285.80 is: 42,428.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,689.80 : 125,534.70 = 28,285.80 : x
  2. Step 2: Convert to fraction form
    83,689.80/125,534.70 = 28,285.80/x
  3. Step 3: Cross multiply
    83,689.80x = 125,534.70 × 28,285.80
  4. Step 4: Simplify right side
    83,689.80x = 3,550,849,417.26
  5. Step 5: Solve for x
    x = 3,550,849,417.26/83,689.80
  6. Step 6: Final answer
    x = 42,428.70

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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.