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Finding the Fourth Proportional to 111,079.65, 153,314.46 and 76,672.65

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Solution

The fourth proportional to 111,079.65, 153,314.46 and 76,672.65 is: 105,825.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,079.65 : 153,314.46 = 76,672.65 : x
  2. Step 2: Convert to fraction form
    111,079.65/153,314.46 = 76,672.65/x
  3. Step 3: Cross multiply
    111,079.65x = 153,314.46 × 76,672.65
  4. Step 4: Simplify right side
    111,079.65x = 11,755,025,931.52
  5. Step 5: Solve for x
    x = 11,755,025,931.52/111,079.65
  6. Step 6: Final answer
    x = 105,825.20

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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.