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Finding the Fourth Proportional to 221,343.57, 305,445.10 and 130,728.87

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Solution

The fourth proportional to 221,343.57, 305,445.10 and 130,728.87 is: 180,400.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,343.57 : 305,445.10 = 130,728.87 : x
  2. Step 2: Convert to fraction form
    221,343.57/305,445.10 = 130,728.87/x
  3. Step 3: Cross multiply
    221,343.57x = 305,445.10 × 130,728.87
  4. Step 4: Simplify right side
    221,343.57x = 39,930,490,589.17
  5. Step 5: Solve for x
    x = 39,930,490,589.17/221,343.57
  6. Step 6: Final answer
    x = 180,400.50

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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.