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Finding the Fourth Proportional to 66,728.04, 100,141.20 and 53,737.20

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Solution

The fourth proportional to 66,728.04, 100,141.20 and 53,737.20 is: 80,645.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,728.04 : 100,141.20 = 53,737.20 : x
  2. Step 2: Convert to fraction form
    66,728.04/100,141.20 = 53,737.20/x
  3. Step 3: Cross multiply
    66,728.04x = 100,141.20 × 53,737.20
  4. Step 4: Simplify right side
    66,728.04x = 5,381,307,692.64
  5. Step 5: Solve for x
    x = 5,381,307,692.64/66,728.04
  6. Step 6: Final answer
    x = 80,645.37

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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.