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Finding the Fourth Proportional to 156,960.90, 216,600.12 and 85,338.45

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Solution

The fourth proportional to 156,960.90, 216,600.12 and 85,338.45 is: 117,763.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,960.90 : 216,600.12 = 85,338.45 : x
  2. Step 2: Convert to fraction form
    156,960.90/216,600.12 = 85,338.45/x
  3. Step 3: Cross multiply
    156,960.90x = 216,600.12 × 85,338.45
  4. Step 4: Simplify right side
    156,960.90x = 18,484,318,510.61
  5. Step 5: Solve for x
    x = 18,484,318,510.61/156,960.90
  6. Step 6: Final answer
    x = 117,763.84

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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.