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Finding the Fourth Proportional to 156,751.40, 216,318.90 and 85,132.62

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Solution

The fourth proportional to 156,751.40, 216,318.90 and 85,132.62 is: 117,484.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,751.40 : 216,318.90 = 85,132.62 : x
  2. Step 2: Convert to fraction form
    156,751.40/216,318.90 = 85,132.62/x
  3. Step 3: Cross multiply
    156,751.40x = 216,318.90 × 85,132.62
  4. Step 4: Simplify right side
    156,751.40x = 18,415,795,031.77
  5. Step 5: Solve for x
    x = 18,415,795,031.77/156,751.40
  6. Step 6: Final answer
    x = 117,484.08

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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.