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Finding the Fourth Proportional to 66,465.70, 99,708.50 and 21,472.02

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Solution

The fourth proportional to 66,465.70, 99,708.50 and 21,472.02 is: 32,211.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,465.70 : 99,708.50 = 21,472.02 : x
  2. Step 2: Convert to fraction form
    66,465.70/99,708.50 = 21,472.02/x
  3. Step 3: Cross multiply
    66,465.70x = 99,708.50 × 21,472.02
  4. Step 4: Simplify right side
    66,465.70x = 2,140,942,959.85
  5. Step 5: Solve for x
    x = 2,140,942,959.85/66,465.70
  6. Step 6: Final answer
    x = 32,211.25

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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.