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Finding the Fourth Proportional to 136,998.40, 205,497.60 and 38,489.60

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Solution

The fourth proportional to 136,998.40, 205,497.60 and 38,489.60 is: 57,734.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,998.40 : 205,497.60 = 38,489.60 : x
  2. Step 2: Convert to fraction form
    136,998.40/205,497.60 = 38,489.60/x
  3. Step 3: Cross multiply
    136,998.40x = 205,497.60 × 38,489.60
  4. Step 4: Simplify right side
    136,998.40x = 7,909,520,424.96
  5. Step 5: Solve for x
    x = 7,909,520,424.96/136,998.40
  6. Step 6: Final answer
    x = 57,734.40

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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.