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Finding the Fourth Proportional to 156,808.92, 216,445.50 and 100,220.16

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Solution

The fourth proportional to 156,808.92, 216,445.50 and 100,220.16 is: 138,335.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,808.92 : 216,445.50 = 100,220.16 : x
  2. Step 2: Convert to fraction form
    156,808.92/216,445.50 = 100,220.16/x
  3. Step 3: Cross multiply
    156,808.92x = 216,445.50 × 100,220.16
  4. Step 4: Simplify right side
    156,808.92x = 21,692,202,641.28
  5. Step 5: Solve for x
    x = 21,692,202,641.28/156,808.92
  6. Step 6: Final answer
    x = 138,335.26

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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.