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Finding the Fourth Proportional to 155,881.80, 215,116.20 and 84,261.96

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Solution

The fourth proportional to 155,881.80, 215,116.20 and 84,261.96 is: 116,281.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,881.80 : 215,116.20 = 84,261.96 : x
  2. Step 2: Convert to fraction form
    155,881.80/215,116.20 = 84,261.96/x
  3. Step 3: Cross multiply
    155,881.80x = 215,116.20 × 84,261.96
  4. Step 4: Simplify right side
    155,881.80x = 18,126,112,639.75
  5. Step 5: Solve for x
    x = 18,126,112,639.75/155,881.80
  6. Step 6: Final answer
    x = 116,281.14

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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.