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Finding the Fourth Proportional to 99,474.95, 137,398.74 and 72,207.54

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Solution

The fourth proportional to 99,474.95, 137,398.74 and 72,207.54 is: 99,735.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,474.95 : 137,398.74 = 72,207.54 : x
  2. Step 2: Convert to fraction form
    99,474.95/137,398.74 = 72,207.54/x
  3. Step 3: Cross multiply
    99,474.95x = 137,398.74 × 72,207.54
  4. Step 4: Simplify right side
    99,474.95x = 9,921,225,014.50
  5. Step 5: Solve for x
    x = 9,921,225,014.50/99,474.95
  6. Step 6: Final answer
    x = 99,735.91

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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.