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Finding the Fourth Proportional to 78,898.60, 108,807.95 and 61,673.24

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Solution

The fourth proportional to 78,898.60, 108,807.95 and 61,673.24 is: 85,052.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,898.60 : 108,807.95 = 61,673.24 : x
  2. Step 2: Convert to fraction form
    78,898.60/108,807.95 = 61,673.24/x
  3. Step 3: Cross multiply
    78,898.60x = 108,807.95 × 61,673.24
  4. Step 4: Simplify right side
    78,898.60x = 6,710,538,505.89
  5. Step 5: Solve for x
    x = 6,710,538,505.89/78,898.60
  6. Step 6: Final answer
    x = 85,052.70

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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.