Home / 156,938.20-216,553.50-100,309.40

Finding the Fourth Proportional to 156,938.20, 216,553.50 and 100,309.40

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Solution

The fourth proportional to 156,938.20, 216,553.50 and 100,309.40 is: 138,413.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,938.20 : 216,553.50 = 100,309.40 : x
  2. Step 2: Convert to fraction form
    156,938.20/216,553.50 = 100,309.40/x
  3. Step 3: Cross multiply
    156,938.20x = 216,553.50 × 100,309.40
  4. Step 4: Simplify right side
    156,938.20x = 21,722,351,652.90
  5. Step 5: Solve for x
    x = 21,722,351,652.90/156,938.20
  6. Step 6: Final answer
    x = 138,413.41

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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.