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Finding the Fourth Proportional to 78,339.25, 108,003.76 and 62,260.25

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Solution

The fourth proportional to 78,339.25, 108,003.76 and 62,260.25 is: 85,836.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,339.25 : 108,003.76 = 62,260.25 : x
  2. Step 2: Convert to fraction form
    78,339.25/108,003.76 = 62,260.25/x
  3. Step 3: Cross multiply
    78,339.25x = 108,003.76 × 62,260.25
  4. Step 4: Simplify right side
    78,339.25x = 6,724,341,098.54
  5. Step 5: Solve for x
    x = 6,724,341,098.54/78,339.25
  6. Step 6: Final answer
    x = 85,836.17

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1.5x scale

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.