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Finding the Fourth Proportional to 138,597.20, 208,087.80 and 88,984.40

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Solution

The fourth proportional to 138,597.20, 208,087.80 and 88,984.40 is: 133,599.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,597.20 : 208,087.80 = 88,984.40 : x
  2. Step 2: Convert to fraction form
    138,597.20/208,087.80 = 88,984.40/x
  3. Step 3: Cross multiply
    138,597.20x = 208,087.80 × 88,984.40
  4. Step 4: Simplify right side
    138,597.20x = 18,516,568,030.32
  5. Step 5: Solve for x
    x = 18,516,568,030.32/138,597.20
  6. Step 6: Final answer
    x = 133,599.87

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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.