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Finding the Fourth Proportional to 66,502.20, 99,703.70 and 40,201.40

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Solution

The fourth proportional to 66,502.20, 99,703.70 and 40,201.40 is: 60,272.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,502.20 : 99,703.70 = 40,201.40 : x
  2. Step 2: Convert to fraction form
    66,502.20/99,703.70 = 40,201.40/x
  3. Step 3: Cross multiply
    66,502.20x = 99,703.70 × 40,201.40
  4. Step 4: Simplify right side
    66,502.20x = 4,008,228,325.18
  5. Step 5: Solve for x
    x = 4,008,228,325.18/66,502.20
  6. Step 6: Final answer
    x = 60,272.12

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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.