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Finding the Fourth Proportional to 156,891.62, 216,512.12 and 85,271.66

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Solution

The fourth proportional to 156,891.62, 216,512.12 and 85,271.66 is: 117,675.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,891.62 : 216,512.12 = 85,271.66 : x
  2. Step 2: Convert to fraction form
    156,891.62/216,512.12 = 85,271.66/x
  3. Step 3: Cross multiply
    156,891.62x = 216,512.12 × 85,271.66
  4. Step 4: Simplify right side
    156,891.62x = 18,462,347,882.52
  5. Step 5: Solve for x
    x = 18,462,347,882.52/156,891.62
  6. Step 6: Final answer
    x = 117,675.81

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1.5x scale

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.