Home / 109,115.08-150,663.54-85,200.28

Finding the Fourth Proportional to 109,115.08, 150,663.54 and 85,200.28

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Solution

The fourth proportional to 109,115.08, 150,663.54 and 85,200.28 is: 117,642.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,115.08 : 150,663.54 = 85,200.28 : x
  2. Step 2: Convert to fraction form
    109,115.08/150,663.54 = 85,200.28/x
  3. Step 3: Cross multiply
    109,115.08x = 150,663.54 × 85,200.28
  4. Step 4: Simplify right side
    109,115.08x = 12,836,575,793.79
  5. Step 5: Solve for x
    x = 12,836,575,793.79/109,115.08
  6. Step 6: Final answer
    x = 117,642.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.