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Finding the Fourth Proportional to 84,671.75, 126,991.41 and 42,540.15

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Solution

The fourth proportional to 84,671.75, 126,991.41 and 42,540.15 is: 63,802.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,671.75 : 126,991.41 = 42,540.15 : x
  2. Step 2: Convert to fraction form
    84,671.75/126,991.41 = 42,540.15/x
  3. Step 3: Cross multiply
    84,671.75x = 126,991.41 × 42,540.15
  4. Step 4: Simplify right side
    84,671.75x = 5,402,233,630.11
  5. Step 5: Solve for x
    x = 5,402,233,630.11/84,671.75
  6. Step 6: Final answer
    x = 63,802.08

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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.