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Finding the Fourth Proportional to 99,473.95, 137,397.36 and 72,206.54

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Solution

The fourth proportional to 99,473.95, 137,397.36 and 72,206.54 is: 99,734.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,473.95 : 137,397.36 = 72,206.54 : x
  2. Step 2: Convert to fraction form
    99,473.95/137,397.36 = 72,206.54/x
  3. Step 3: Cross multiply
    99,473.95x = 137,397.36 × 72,206.54
  4. Step 4: Simplify right side
    99,473.95x = 9,920,988,069.76
  5. Step 5: Solve for x
    x = 9,920,988,069.76/99,473.95
  6. Step 6: Final answer
    x = 99,734.54

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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.