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Finding the Fourth Proportional to 66,412.20, 99,503.10 and 43,026.60

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Solution

The fourth proportional to 66,412.20, 99,503.10 and 43,026.60 is: 64,465.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,412.20 : 99,503.10 = 43,026.60 : x
  2. Step 2: Convert to fraction form
    66,412.20/99,503.10 = 43,026.60/x
  3. Step 3: Cross multiply
    66,412.20x = 99,503.10 × 43,026.60
  4. Step 4: Simplify right side
    66,412.20x = 4,281,280,082.46
  5. Step 5: Solve for x
    x = 4,281,280,082.46/66,412.20
  6. Step 6: Final answer
    x = 64,465.27

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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.