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Finding the Fourth Proportional to 142,003.60, 213,005.40 and 42,179.20

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Solution

The fourth proportional to 142,003.60, 213,005.40 and 42,179.20 is: 63,268.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,003.60 : 213,005.40 = 42,179.20 : x
  2. Step 2: Convert to fraction form
    142,003.60/213,005.40 = 42,179.20/x
  3. Step 3: Cross multiply
    142,003.60x = 213,005.40 × 42,179.20
  4. Step 4: Simplify right side
    142,003.60x = 8,984,397,367.68
  5. Step 5: Solve for x
    x = 8,984,397,367.68/142,003.60
  6. Step 6: Final answer
    x = 63,268.80

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1.5x scale

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.