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Finding the Fourth Proportional to 64,318.70, 88,711 and 56,347.08

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Solution

The fourth proportional to 64,318.70, 88,711 and 56,347.08 is: 77,716.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,318.70 : 88,711 = 56,347.08 : x
  2. Step 2: Convert to fraction form
    64,318.70/88,711 = 56,347.08/x
  3. Step 3: Cross multiply
    64,318.70x = 88,711 × 56,347.08
  4. Step 4: Simplify right side
    64,318.70x = 4,998,605,813.88
  5. Step 5: Solve for x
    x = 4,998,605,813.88/64,318.70
  6. Step 6: Final answer
    x = 77,716.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.