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Finding the Fourth Proportional to 112,951.16, 155,888.36 and 65,203.64

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Solution

The fourth proportional to 112,951.16, 155,888.36 and 65,203.64 is: 89,990.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,951.16 : 155,888.36 = 65,203.64 : x
  2. Step 2: Convert to fraction form
    112,951.16/155,888.36 = 65,203.64/x
  3. Step 3: Cross multiply
    112,951.16x = 155,888.36 × 65,203.64
  4. Step 4: Simplify right side
    112,951.16x = 10,164,488,505.63
  5. Step 5: Solve for x
    x = 10,164,488,505.63/112,951.16
  6. Step 6: Final answer
    x = 89,990.12

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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.