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Finding the Fourth Proportional to 65,115.88, 89,860.45 and 35,307.88

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Solution

The fourth proportional to 65,115.88, 89,860.45 and 35,307.88 is: 48,725.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,115.88 : 89,860.45 = 35,307.88 : x
  2. Step 2: Convert to fraction form
    65,115.88/89,860.45 = 35,307.88/x
  3. Step 3: Cross multiply
    65,115.88x = 89,860.45 × 35,307.88
  4. Step 4: Simplify right side
    65,115.88x = 3,172,781,536.04
  5. Step 5: Solve for x
    x = 3,172,781,536.04/65,115.88
  6. Step 6: Final answer
    x = 48,725.16

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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.