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Finding the Fourth Proportional to 78,520.69, 108,410.54 and 60,338.93

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Solution

The fourth proportional to 78,520.69, 108,410.54 and 60,338.93 is: 83,307.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,520.69 : 108,410.54 = 60,338.93 : x
  2. Step 2: Convert to fraction form
    78,520.69/108,410.54 = 60,338.93/x
  3. Step 3: Cross multiply
    78,520.69x = 108,410.54 × 60,338.93
  4. Step 4: Simplify right side
    78,520.69x = 6,541,375,140.57
  5. Step 5: Solve for x
    x = 6,541,375,140.57/78,520.69
  6. Step 6: Final answer
    x = 83,307.66

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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.