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Finding the Fourth Proportional to 78,079.78, 107,750.66 and 42,269.88

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Solution

The fourth proportional to 78,079.78, 107,750.66 and 42,269.88 is: 58,332.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,079.78 : 107,750.66 = 42,269.88 : x
  2. Step 2: Convert to fraction form
    78,079.78/107,750.66 = 42,269.88/x
  3. Step 3: Cross multiply
    78,079.78x = 107,750.66 × 42,269.88
  4. Step 4: Simplify right side
    78,079.78x = 4,554,607,660.84
  5. Step 5: Solve for x
    x = 4,554,607,660.84/78,079.78
  6. Step 6: Final answer
    x = 58,332.74

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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.