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Finding the Fourth Proportional to 74,553.90, 102,886.84 and 42,728.90

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Solution

The fourth proportional to 74,553.90, 102,886.84 and 42,728.90 is: 58,967.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,553.90 : 102,886.84 = 42,728.90 : x
  2. Step 2: Convert to fraction form
    74,553.90/102,886.84 = 42,728.90/x
  3. Step 3: Cross multiply
    74,553.90x = 102,886.84 × 42,728.90
  4. Step 4: Simplify right side
    74,553.90x = 4,396,241,497.68
  5. Step 5: Solve for x
    x = 4,396,241,497.68/74,553.90
  6. Step 6: Final answer
    x = 58,967.29

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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.