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Finding the Fourth Proportional to 159,054, 219,489.84 and 91,068.72

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Solution

The fourth proportional to 159,054, 219,489.84 and 91,068.72 is: 125,672.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,054 : 219,489.84 = 91,068.72 : x
  2. Step 2: Convert to fraction form
    159,054/219,489.84 = 91,068.72/x
  3. Step 3: Cross multiply
    159,054x = 219,489.84 × 91,068.72
  4. Step 4: Simplify right side
    159,054x = 19,988,658,781.80
  5. Step 5: Solve for x
    x = 19,988,658,781.80/159,054
  6. Step 6: Final answer
    x = 125,672.15

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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.