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Finding the Fourth Proportional to 142,410.80, 213,635.40 and 48,945.20

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Solution

The fourth proportional to 142,410.80, 213,635.40 and 48,945.20 is: 73,424.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,410.80 : 213,635.40 = 48,945.20 : x
  2. Step 2: Convert to fraction form
    142,410.80/213,635.40 = 48,945.20/x
  3. Step 3: Cross multiply
    142,410.80x = 213,635.40 × 48,945.20
  4. Step 4: Simplify right side
    142,410.80x = 10,456,427,380.08
  5. Step 5: Solve for x
    x = 10,456,427,380.08/142,410.80
  6. Step 6: Final answer
    x = 73,424.40

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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.