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Finding the Fourth Proportional to 99,260.40, 148,631.40 and 64,009.20

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Solution

The fourth proportional to 99,260.40, 148,631.40 and 64,009.20 is: 95,846.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,260.40 : 148,631.40 = 64,009.20 : x
  2. Step 2: Convert to fraction form
    99,260.40/148,631.40 = 64,009.20/x
  3. Step 3: Cross multiply
    99,260.40x = 148,631.40 × 64,009.20
  4. Step 4: Simplify right side
    99,260.40x = 9,513,777,008.88
  5. Step 5: Solve for x
    x = 9,513,777,008.88/99,260.40
  6. Step 6: Final answer
    x = 95,846.65

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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.