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Finding the Fourth Proportional to 111,500.66, 153,872.80 and 63,754.40

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Solution

The fourth proportional to 111,500.66, 153,872.80 and 63,754.40 is: 87,982.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,500.66 : 153,872.80 = 63,754.40 : x
  2. Step 2: Convert to fraction form
    111,500.66/153,872.80 = 63,754.40/x
  3. Step 3: Cross multiply
    111,500.66x = 153,872.80 × 63,754.40
  4. Step 4: Simplify right side
    111,500.66x = 9,810,068,040.32
  5. Step 5: Solve for x
    x = 9,810,068,040.32/111,500.66
  6. Step 6: Final answer
    x = 87,982.15

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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.