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Finding the Fourth Proportional to 74,708.10, 112,123.35 and 74,124.90

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Solution

The fourth proportional to 74,708.10, 112,123.35 and 74,124.90 is: 111,248.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,708.10 : 112,123.35 = 74,124.90 : x
  2. Step 2: Convert to fraction form
    74,708.10/112,123.35 = 74,124.90/x
  3. Step 3: Cross multiply
    74,708.10x = 112,123.35 × 74,124.90
  4. Step 4: Simplify right side
    74,708.10x = 8,311,132,106.42
  5. Step 5: Solve for x
    x = 8,311,132,106.42/74,708.10
  6. Step 6: Final answer
    x = 111,248.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.