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Finding the Fourth Proportional to 99,507.68, 137,320.72 and 54,795.68

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Solution

The fourth proportional to 99,507.68, 137,320.72 and 54,795.68 is: 75,618.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,507.68 : 137,320.72 = 54,795.68 : x
  2. Step 2: Convert to fraction form
    99,507.68/137,320.72 = 54,795.68/x
  3. Step 3: Cross multiply
    99,507.68x = 137,320.72 × 54,795.68
  4. Step 4: Simplify right side
    99,507.68x = 7,524,582,230.49
  5. Step 5: Solve for x
    x = 7,524,582,230.49/99,507.68
  6. Step 6: Final answer
    x = 75,618.11

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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.