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Finding the Fourth Proportional to 78,353.66, 108,125.01 and 42,542.85

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Solution

The fourth proportional to 78,353.66, 108,125.01 and 42,542.85 is: 58,707.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,353.66 : 108,125.01 = 42,542.85 : x
  2. Step 2: Convert to fraction form
    78,353.66/108,125.01 = 42,542.85/x
  3. Step 3: Cross multiply
    78,353.66x = 108,125.01 × 42,542.85
  4. Step 4: Simplify right side
    78,353.66x = 4,599,945,801.05
  5. Step 5: Solve for x
    x = 4,599,945,801.05/78,353.66
  6. Step 6: Final answer
    x = 58,707.48

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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.