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Finding the Fourth Proportional to 99,707.92, 137,597 and 57,269.20

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Solution

The fourth proportional to 99,707.92, 137,597 and 57,269.20 is: 79,031.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,707.92 : 137,597 = 57,269.20 : x
  2. Step 2: Convert to fraction form
    99,707.92/137,597 = 57,269.20/x
  3. Step 3: Cross multiply
    99,707.92x = 137,597 × 57,269.20
  4. Step 4: Simplify right side
    99,707.92x = 7,880,070,112.40
  5. Step 5: Solve for x
    x = 7,880,070,112.40/99,707.92
  6. Step 6: Final answer
    x = 79,031.54

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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.