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Finding the Fourth Proportional to 75,660.66, 104,407.65 and 42,124.50

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Solution

The fourth proportional to 75,660.66, 104,407.65 and 42,124.50 is: 58,129.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,660.66 : 104,407.65 = 42,124.50 : x
  2. Step 2: Convert to fraction form
    75,660.66/104,407.65 = 42,124.50/x
  3. Step 3: Cross multiply
    75,660.66x = 104,407.65 × 42,124.50
  4. Step 4: Simplify right side
    75,660.66x = 4,398,120,052.43
  5. Step 5: Solve for x
    x = 4,398,120,052.43/75,660.66
  6. Step 6: Final answer
    x = 58,129.55

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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.