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Finding the Fourth Proportional to 66,522.20, 99,783.30 and 65,428.70

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Solution

The fourth proportional to 66,522.20, 99,783.30 and 65,428.70 is: 98,143.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,522.20 : 99,783.30 = 65,428.70 : x
  2. Step 2: Convert to fraction form
    66,522.20/99,783.30 = 65,428.70/x
  3. Step 3: Cross multiply
    66,522.20x = 99,783.30 × 65,428.70
  4. Step 4: Simplify right side
    66,522.20x = 6,528,691,600.71
  5. Step 5: Solve for x
    x = 6,528,691,600.71/66,522.20
  6. Step 6: Final answer
    x = 98,143.05

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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.