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Finding the Fourth Proportional to 74,693.40, 112,040.10 and 68,472.60

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Solution

The fourth proportional to 74,693.40, 112,040.10 and 68,472.60 is: 102,708.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,693.40 : 112,040.10 = 68,472.60 : x
  2. Step 2: Convert to fraction form
    74,693.40/112,040.10 = 68,472.60/x
  3. Step 3: Cross multiply
    74,693.40x = 112,040.10 × 68,472.60
  4. Step 4: Simplify right side
    74,693.40x = 7,671,676,951.26
  5. Step 5: Solve for x
    x = 7,671,676,951.26/74,693.40
  6. Step 6: Final answer
    x = 102,708.90

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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.