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Finding the Fourth Proportional to 137,031.20, 205,546.80 and 89,722.40

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Solution

The fourth proportional to 137,031.20, 205,546.80 and 89,722.40 is: 134,583.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,031.20 : 205,546.80 = 89,722.40 : x
  2. Step 2: Convert to fraction form
    137,031.20/205,546.80 = 89,722.40/x
  3. Step 3: Cross multiply
    137,031.20x = 205,546.80 × 89,722.40
  4. Step 4: Simplify right side
    137,031.20x = 18,442,152,208.32
  5. Step 5: Solve for x
    x = 18,442,152,208.32/137,031.20
  6. Step 6: Final answer
    x = 134,583.60

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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.