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Finding the Fourth Proportional to 151,690.30, 209,340.66 and 91,279.96

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Solution

The fourth proportional to 151,690.30, 209,340.66 and 91,279.96 is: 125,971.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,690.30 : 209,340.66 = 91,279.96 : x
  2. Step 2: Convert to fraction form
    151,690.30/209,340.66 = 91,279.96/x
  3. Step 3: Cross multiply
    151,690.30x = 209,340.66 × 91,279.96
  4. Step 4: Simplify right side
    151,690.30x = 19,108,607,071.17
  5. Step 5: Solve for x
    x = 19,108,607,071.17/151,690.30
  6. Step 6: Final answer
    x = 125,971.19

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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.