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Finding the Fourth Proportional to 77,438.60, 115,985.10 and 63,614.60

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Solution

The fourth proportional to 77,438.60, 115,985.10 and 63,614.60 is: 95,279.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,438.60 : 115,985.10 = 63,614.60 : x
  2. Step 2: Convert to fraction form
    77,438.60/115,985.10 = 63,614.60/x
  3. Step 3: Cross multiply
    77,438.60x = 115,985.10 × 63,614.60
  4. Step 4: Simplify right side
    77,438.60x = 7,378,345,742.46
  5. Step 5: Solve for x
    x = 7,378,345,742.46/77,438.60
  6. Step 6: Final answer
    x = 95,279.95

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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.