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Finding the Fourth Proportional to 138,802.92, 191,540.73 and 81,434.25

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Solution

The fourth proportional to 138,802.92, 191,540.73 and 81,434.25 is: 112,374.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,802.92 : 191,540.73 = 81,434.25 : x
  2. Step 2: Convert to fraction form
    138,802.92/191,540.73 = 81,434.25/x
  3. Step 3: Cross multiply
    138,802.92x = 191,540.73 × 81,434.25
  4. Step 4: Simplify right side
    138,802.92x = 15,597,975,692.00
  5. Step 5: Solve for x
    x = 15,597,975,692.00/138,802.92
  6. Step 6: Final answer
    x = 112,374.98

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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.