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Finding the Fourth Proportional to 110,947.60, 166,421.40 and 66,041.20

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Solution

The fourth proportional to 110,947.60, 166,421.40 and 66,041.20 is: 99,061.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,947.60 : 166,421.40 = 66,041.20 : x
  2. Step 2: Convert to fraction form
    110,947.60/166,421.40 = 66,041.20/x
  3. Step 3: Cross multiply
    110,947.60x = 166,421.40 × 66,041.20
  4. Step 4: Simplify right side
    110,947.60x = 10,990,668,961.68
  5. Step 5: Solve for x
    x = 10,990,668,961.68/110,947.60
  6. Step 6: Final answer
    x = 99,061.80

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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.