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Finding the Fourth Proportional to 112,700.89, 168,782.98 and 65,215.88

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Solution

The fourth proportional to 112,700.89, 168,782.98 and 65,215.88 is: 97,668.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,700.89 : 168,782.98 = 65,215.88 : x
  2. Step 2: Convert to fraction form
    112,700.89/168,782.98 = 65,215.88/x
  3. Step 3: Cross multiply
    112,700.89x = 168,782.98 × 65,215.88
  4. Step 4: Simplify right side
    112,700.89x = 11,007,331,175.68
  5. Step 5: Solve for x
    x = 11,007,331,175.68/112,700.89
  6. Step 6: Final answer
    x = 97,668.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.