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Finding the Fourth Proportional to 111,001.26, 153,079.52 and 72,746.87

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Solution

The fourth proportional to 111,001.26, 153,079.52 and 72,746.87 is: 100,323.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,001.26 : 153,079.52 = 72,746.87 : x
  2. Step 2: Convert to fraction form
    111,001.26/153,079.52 = 72,746.87/x
  3. Step 3: Cross multiply
    111,001.26x = 153,079.52 × 72,746.87
  4. Step 4: Simplify right side
    111,001.26x = 11,136,055,941.10
  5. Step 5: Solve for x
    x = 11,136,055,941.10/111,001.26
  6. Step 6: Final answer
    x = 100,323.69

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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.