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Finding the Fourth Proportional to 78,369.52, 108,076.80 and 60,435.76

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Solution

The fourth proportional to 78,369.52, 108,076.80 and 60,435.76 is: 83,344.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,369.52 : 108,076.80 = 60,435.76 : x
  2. Step 2: Convert to fraction form
    78,369.52/108,076.80 = 60,435.76/x
  3. Step 3: Cross multiply
    78,369.52x = 108,076.80 × 60,435.76
  4. Step 4: Simplify right side
    78,369.52x = 6,531,703,546.37
  5. Step 5: Solve for x
    x = 6,531,703,546.37/78,369.52
  6. Step 6: Final answer
    x = 83,344.95

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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.