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Finding the Fourth Proportional to 98,440.20, 135,847.44 and 53,728.20

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Solution

The fourth proportional to 98,440.20, 135,847.44 and 53,728.20 is: 74,144.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,440.20 : 135,847.44 = 53,728.20 : x
  2. Step 2: Convert to fraction form
    98,440.20/135,847.44 = 53,728.20/x
  3. Step 3: Cross multiply
    98,440.20x = 135,847.44 × 53,728.20
  4. Step 4: Simplify right side
    98,440.20x = 7,298,838,425.81
  5. Step 5: Solve for x
    x = 7,298,838,425.81/98,440.20
  6. Step 6: Final answer
    x = 74,144.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.