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Finding the Fourth Proportional to 59,705.80, 89,429.10 and 53,139.40

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Solution

The fourth proportional to 59,705.80, 89,429.10 and 53,139.40 is: 79,593.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,705.80 : 89,429.10 = 53,139.40 : x
  2. Step 2: Convert to fraction form
    59,705.80/89,429.10 = 53,139.40/x
  3. Step 3: Cross multiply
    59,705.80x = 89,429.10 × 53,139.40
  4. Step 4: Simplify right side
    59,705.80x = 4,752,208,716.54
  5. Step 5: Solve for x
    x = 4,752,208,716.54/59,705.80
  6. Step 6: Final answer
    x = 79,593.75

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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.