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Finding the Fourth Proportional to 111,248.40, 166,872.60 and 64,009.20

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Solution

The fourth proportional to 111,248.40, 166,872.60 and 64,009.20 is: 96,013.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,248.40 : 166,872.60 = 64,009.20 : x
  2. Step 2: Convert to fraction form
    111,248.40/166,872.60 = 64,009.20/x
  3. Step 3: Cross multiply
    111,248.40x = 166,872.60 × 64,009.20
  4. Step 4: Simplify right side
    111,248.40x = 10,681,381,627.92
  5. Step 5: Solve for x
    x = 10,681,381,627.92/111,248.40
  6. Step 6: Final answer
    x = 96,013.80

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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.