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Finding the Fourth Proportional to 112,908.66, 155,818.80 and 65,161.86

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Solution

The fourth proportional to 112,908.66, 155,818.80 and 65,161.86 is: 89,926.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,908.66 : 155,818.80 = 65,161.86 : x
  2. Step 2: Convert to fraction form
    112,908.66/155,818.80 = 65,161.86/x
  3. Step 3: Cross multiply
    112,908.66x = 155,818.80 × 65,161.86
  4. Step 4: Simplify right side
    112,908.66x = 10,153,442,830.97
  5. Step 5: Solve for x
    x = 10,153,442,830.97/112,908.66
  6. Step 6: Final answer
    x = 89,926.17

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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.