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Finding the Fourth Proportional to 78,614, 108,529.12 and 63,132.16

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Solution

The fourth proportional to 78,614, 108,529.12 and 63,132.16 is: 87,155.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,614 : 108,529.12 = 63,132.16 : x
  2. Step 2: Convert to fraction form
    78,614/108,529.12 = 63,132.16/x
  3. Step 3: Cross multiply
    78,614x = 108,529.12 × 63,132.16
  4. Step 4: Simplify right side
    78,614x = 6,851,677,768.50
  5. Step 5: Solve for x
    x = 6,851,677,768.50/78,614
  6. Step 6: Final answer
    x = 87,155.95

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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.