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Finding the Fourth Proportional to 78,339.54, 108,125.62 and 48,140.70

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Solution

The fourth proportional to 78,339.54, 108,125.62 and 48,140.70 is: 66,444.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,339.54 : 108,125.62 = 48,140.70 : x
  2. Step 2: Convert to fraction form
    78,339.54/108,125.62 = 48,140.70/x
  3. Step 3: Cross multiply
    78,339.54x = 108,125.62 × 48,140.70
  4. Step 4: Simplify right side
    78,339.54x = 5,205,243,034.73
  5. Step 5: Solve for x
    x = 5,205,243,034.73/78,339.54
  6. Step 6: Final answer
    x = 66,444.65

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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.