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Finding the Fourth Proportional to 156,966.59, 216,607.91 and 85,346.66

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Solution

The fourth proportional to 156,966.59, 216,607.91 and 85,346.66 is: 117,775.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,966.59 : 216,607.91 = 85,346.66 : x
  2. Step 2: Convert to fraction form
    156,966.59/216,607.91 = 85,346.66/x
  3. Step 3: Cross multiply
    156,966.59x = 216,607.91 × 85,346.66
  4. Step 4: Simplify right side
    156,966.59x = 18,486,762,402.97
  5. Step 5: Solve for x
    x = 18,486,762,402.97/156,966.59
  6. Step 6: Final answer
    x = 117,775.15

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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.