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Finding the Fourth Proportional to 156,886.62, 216,505.22 and 85,266.66

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Solution

The fourth proportional to 156,886.62, 216,505.22 and 85,266.66 is: 117,668.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,886.62 : 216,505.22 = 85,266.66 : x
  2. Step 2: Convert to fraction form
    156,886.62/216,505.22 = 85,266.66/x
  3. Step 3: Cross multiply
    156,886.62x = 216,505.22 × 85,266.66
  4. Step 4: Simplify right side
    156,886.62x = 18,460,676,981.97
  5. Step 5: Solve for x
    x = 18,460,676,981.97/156,886.62
  6. Step 6: Final answer
    x = 117,668.91

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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.