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Finding the Fourth Proportional to 66,074.40, 98,909.10 and 36,401.40

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Solution

The fourth proportional to 66,074.40, 98,909.10 and 36,401.40 is: 54,490.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,074.40 : 98,909.10 = 36,401.40 : x
  2. Step 2: Convert to fraction form
    66,074.40/98,909.10 = 36,401.40/x
  3. Step 3: Cross multiply
    66,074.40x = 98,909.10 × 36,401.40
  4. Step 4: Simplify right side
    66,074.40x = 3,600,429,712.74
  5. Step 5: Solve for x
    x = 3,600,429,712.74/66,074.40
  6. Step 6: Final answer
    x = 54,490.54

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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.