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Finding the Fourth Proportional to 158,785.84, 219,141.90 and 90,809.14

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Solution

The fourth proportional to 158,785.84, 219,141.90 and 90,809.14 is: 125,326.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,785.84 : 219,141.90 = 90,809.14 : x
  2. Step 2: Convert to fraction form
    158,785.84/219,141.90 = 90,809.14/x
  3. Step 3: Cross multiply
    158,785.84x = 219,141.90 × 90,809.14
  4. Step 4: Simplify right side
    158,785.84x = 19,900,087,476.97
  5. Step 5: Solve for x
    x = 19,900,087,476.97/158,785.84
  6. Step 6: Final answer
    x = 125,326.59

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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.