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Finding the Fourth Proportional to 111,376.62, 153,685.96 and 71,113.95

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Solution

The fourth proportional to 111,376.62, 153,685.96 and 71,113.95 is: 98,128.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,376.62 : 153,685.96 = 71,113.95 : x
  2. Step 2: Convert to fraction form
    111,376.62/153,685.96 = 71,113.95/x
  3. Step 3: Cross multiply
    111,376.62x = 153,685.96 × 71,113.95
  4. Step 4: Simplify right side
    111,376.62x = 10,929,215,497.36
  5. Step 5: Solve for x
    x = 10,929,215,497.36/111,376.62
  6. Step 6: Final answer
    x = 98,128.45

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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.