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Finding the Fourth Proportional to 75,661, 104,412.18 and 42,134.92

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Solution

The fourth proportional to 75,661, 104,412.18 and 42,134.92 is: 58,146.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,661 : 104,412.18 = 42,134.92 : x
  2. Step 2: Convert to fraction form
    75,661/104,412.18 = 42,134.92/x
  3. Step 3: Cross multiply
    75,661x = 104,412.18 × 42,134.92
  4. Step 4: Simplify right side
    75,661x = 4,399,398,851.33
  5. Step 5: Solve for x
    x = 4,399,398,851.33/75,661
  6. Step 6: Final answer
    x = 58,146.19

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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.