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Finding the Fourth Proportional to 66,484.20, 99,780.70 and 65,965.80

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Solution

The fourth proportional to 66,484.20, 99,780.70 and 65,965.80 is: 99,002.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,484.20 : 99,780.70 = 65,965.80 : x
  2. Step 2: Convert to fraction form
    66,484.20/99,780.70 = 65,965.80/x
  3. Step 3: Cross multiply
    66,484.20x = 99,780.70 × 65,965.80
  4. Step 4: Simplify right side
    66,484.20x = 6,582,113,700.06
  5. Step 5: Solve for x
    x = 6,582,113,700.06/66,484.20
  6. Step 6: Final answer
    x = 99,002.68

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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.