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Finding the Fourth Proportional to 74,671.76, 103,045.61 and 40,680.92

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Solution

The fourth proportional to 74,671.76, 103,045.61 and 40,680.92 is: 56,138.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,671.76 : 103,045.61 = 40,680.92 : x
  2. Step 2: Convert to fraction form
    74,671.76/103,045.61 = 40,680.92/x
  3. Step 3: Cross multiply
    74,671.76x = 103,045.61 × 40,680.92
  4. Step 4: Simplify right side
    74,671.76x = 4,191,989,498.13
  5. Step 5: Solve for x
    x = 4,191,989,498.13/74,671.76
  6. Step 6: Final answer
    x = 56,138.89

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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.