Home / 109,123.20-163,531.20-80,822.40

Finding the Fourth Proportional to 109,123.20, 163,531.20 and 80,822.40

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Solution

The fourth proportional to 109,123.20, 163,531.20 and 80,822.40 is: 121,119.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,123.20 : 163,531.20 = 80,822.40 : x
  2. Step 2: Convert to fraction form
    109,123.20/163,531.20 = 80,822.40/x
  3. Step 3: Cross multiply
    109,123.20x = 163,531.20 × 80,822.40
  4. Step 4: Simplify right side
    109,123.20x = 13,216,984,058.88
  5. Step 5: Solve for x
    x = 13,216,984,058.88/109,123.20
  6. Step 6: Final answer
    x = 121,119.84

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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.