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Finding the Fourth Proportional to 156,902.86, 216,530.18 and 85,287.72

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Solution

The fourth proportional to 156,902.86, 216,530.18 and 85,287.72 is: 117,699.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,902.86 : 216,530.18 = 85,287.72 : x
  2. Step 2: Convert to fraction form
    156,902.86/216,530.18 = 85,287.72/x
  3. Step 3: Cross multiply
    156,902.86x = 216,530.18 × 85,287.72
  4. Step 4: Simplify right side
    156,902.86x = 18,467,365,363.39
  5. Step 5: Solve for x
    x = 18,467,365,363.39/156,902.86
  6. Step 6: Final answer
    x = 117,699.35

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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.