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Finding the Fourth Proportional to 98,439.40, 147,659.10 and 45,854.20

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Solution

The fourth proportional to 98,439.40, 147,659.10 and 45,854.20 is: 68,781.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,439.40 : 147,659.10 = 45,854.20 : x
  2. Step 2: Convert to fraction form
    98,439.40/147,659.10 = 45,854.20/x
  3. Step 3: Cross multiply
    98,439.40x = 147,659.10 × 45,854.20
  4. Step 4: Simplify right side
    98,439.40x = 6,770,789,903.22
  5. Step 5: Solve for x
    x = 6,770,789,903.22/98,439.40
  6. Step 6: Final answer
    x = 68,781.30

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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.