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Finding the Fourth Proportional to 158,028.60, 218,072.88 and 86,411.10

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Solution

The fourth proportional to 158,028.60, 218,072.88 and 86,411.10 is: 119,243.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,028.60 : 218,072.88 = 86,411.10 : x
  2. Step 2: Convert to fraction form
    158,028.60/218,072.88 = 86,411.10/x
  3. Step 3: Cross multiply
    158,028.60x = 218,072.88 × 86,411.10
  4. Step 4: Simplify right side
    158,028.60x = 18,843,917,440.97
  5. Step 5: Solve for x
    x = 18,843,917,440.97/158,028.60
  6. Step 6: Final answer
    x = 119,243.72

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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.