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Finding the Fourth Proportional to 99,680.25, 137,562.07 and 54,360.71

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Solution

The fourth proportional to 99,680.25, 137,562.07 and 54,360.71 is: 75,019.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,680.25 : 137,562.07 = 54,360.71 : x
  2. Step 2: Convert to fraction form
    99,680.25/137,562.07 = 54,360.71/x
  3. Step 3: Cross multiply
    99,680.25x = 137,562.07 × 54,360.71
  4. Step 4: Simplify right side
    99,680.25x = 7,477,971,314.46
  5. Step 5: Solve for x
    x = 7,477,971,314.46/99,680.25
  6. Step 6: Final answer
    x = 75,019.59

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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.