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Finding the Fourth Proportional to 74,918.67, 103,363.78 and 53,411.92

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Solution

The fourth proportional to 74,918.67, 103,363.78 and 53,411.92 is: 73,691.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,918.67 : 103,363.78 = 53,411.92 : x
  2. Step 2: Convert to fraction form
    74,918.67/103,363.78 = 53,411.92/x
  3. Step 3: Cross multiply
    74,918.67x = 103,363.78 × 53,411.92
  4. Step 4: Simplify right side
    74,918.67x = 5,520,857,164.38
  5. Step 5: Solve for x
    x = 5,520,857,164.38/74,918.67
  6. Step 6: Final answer
    x = 73,691.34

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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.