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Finding the Fourth Proportional to 84,885, 126,430.85 and 80,444.04

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Solution

The fourth proportional to 84,885, 126,430.85 and 80,444.04 is: 119,816.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,885 : 126,430.85 = 80,444.04 : x
  2. Step 2: Convert to fraction form
    84,885/126,430.85 = 80,444.04/x
  3. Step 3: Cross multiply
    84,885x = 126,430.85 × 80,444.04
  4. Step 4: Simplify right side
    84,885x = 10,170,608,354.63
  5. Step 5: Solve for x
    x = 10,170,608,354.63/84,885
  6. Step 6: Final answer
    x = 119,816.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.