Home / 109,031.20-163,546.80-90,004.30

Finding the Fourth Proportional to 109,031.20, 163,546.80 and 90,004.30

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Solution

The fourth proportional to 109,031.20, 163,546.80 and 90,004.30 is: 135,006.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,031.20 : 163,546.80 = 90,004.30 : x
  2. Step 2: Convert to fraction form
    109,031.20/163,546.80 = 90,004.30/x
  3. Step 3: Cross multiply
    109,031.20x = 163,546.80 × 90,004.30
  4. Step 4: Simplify right side
    109,031.20x = 14,719,915,251.24
  5. Step 5: Solve for x
    x = 14,719,915,251.24/109,031.20
  6. Step 6: Final answer
    x = 135,006.45

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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.