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Finding the Fourth Proportional to 99,345.70, 148,921.35 and 40,102.30

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Solution

The fourth proportional to 99,345.70, 148,921.35 and 40,102.30 is: 60,114.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,345.70 : 148,921.35 = 40,102.30 : x
  2. Step 2: Convert to fraction form
    99,345.70/148,921.35 = 40,102.30/x
  3. Step 3: Cross multiply
    99,345.70x = 148,921.35 × 40,102.30
  4. Step 4: Simplify right side
    99,345.70x = 5,972,088,654.11
  5. Step 5: Solve for x
    x = 5,972,088,654.11/99,345.70
  6. Step 6: Final answer
    x = 60,114.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.