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Finding the Fourth Proportional to 158,686.31, 218,787.85 and 116,171.03

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Solution

The fourth proportional to 158,686.31, 218,787.85 and 116,171.03 is: 160,170.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,686.31 : 218,787.85 = 116,171.03 : x
  2. Step 2: Convert to fraction form
    158,686.31/218,787.85 = 116,171.03/x
  3. Step 3: Cross multiply
    158,686.31x = 218,787.85 × 116,171.03
  4. Step 4: Simplify right side
    158,686.31x = 25,416,809,885.99
  5. Step 5: Solve for x
    x = 25,416,809,885.99/158,686.31
  6. Step 6: Final answer
    x = 160,170.15

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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.