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Finding the Fourth Proportional to 99,180.40, 148,916.40 and 69,728.80

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Solution

The fourth proportional to 99,180.40, 148,916.40 and 69,728.80 is: 104,695.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,180.40 : 148,916.40 = 69,728.80 : x
  2. Step 2: Convert to fraction form
    99,180.40/148,916.40 = 69,728.80/x
  3. Step 3: Cross multiply
    99,180.40x = 148,916.40 × 69,728.80
  4. Step 4: Simplify right side
    99,180.40x = 10,383,761,872.32
  5. Step 5: Solve for x
    x = 10,383,761,872.32/99,180.40
  6. Step 6: Final answer
    x = 104,695.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.