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Finding the Fourth Proportional to 78,504.58, 108,337.11 and 42,695.40

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Solution

The fourth proportional to 78,504.58, 108,337.11 and 42,695.40 is: 58,920.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,504.58 : 108,337.11 = 42,695.40 : x
  2. Step 2: Convert to fraction form
    78,504.58/108,337.11 = 42,695.40/x
  3. Step 3: Cross multiply
    78,504.58x = 108,337.11 × 42,695.40
  4. Step 4: Simplify right side
    78,504.58x = 4,625,496,246.29
  5. Step 5: Solve for x
    x = 4,625,496,246.29/78,504.58
  6. Step 6: Final answer
    x = 58,920.08

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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.