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Finding the Fourth Proportional to 66,302.10, 99,343.80 and 55,148.40

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Solution

The fourth proportional to 66,302.10, 99,343.80 and 55,148.40 is: 82,631.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,302.10 : 99,343.80 = 55,148.40 : x
  2. Step 2: Convert to fraction form
    66,302.10/99,343.80 = 55,148.40/x
  3. Step 3: Cross multiply
    66,302.10x = 99,343.80 × 55,148.40
  4. Step 4: Simplify right side
    66,302.10x = 5,478,651,619.92
  5. Step 5: Solve for x
    x = 5,478,651,619.92/66,302.10
  6. Step 6: Final answer
    x = 82,631.65

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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.