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Finding the Fourth Proportional to 100,068.57, 138,029.13 and 59,750.82

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Solution

The fourth proportional to 100,068.57, 138,029.13 and 59,750.82 is: 82,417.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,068.57 : 138,029.13 = 59,750.82 : x
  2. Step 2: Convert to fraction form
    100,068.57/138,029.13 = 59,750.82/x
  3. Step 3: Cross multiply
    100,068.57x = 138,029.13 × 59,750.82
  4. Step 4: Simplify right side
    100,068.57x = 8,247,353,701.39
  5. Step 5: Solve for x
    x = 8,247,353,701.39/100,068.57
  6. Step 6: Final answer
    x = 82,417.02

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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.