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Finding the Fourth Proportional to 159,347.78, 219,895.66 and 87,728.34

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Solution

The fourth proportional to 159,347.78, 219,895.66 and 87,728.34 is: 121,062.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,347.78 : 219,895.66 = 87,728.34 : x
  2. Step 2: Convert to fraction form
    159,347.78/219,895.66 = 87,728.34/x
  3. Step 3: Cross multiply
    159,347.78x = 219,895.66 × 87,728.34
  4. Step 4: Simplify right side
    159,347.78x = 19,291,080,125.53
  5. Step 5: Solve for x
    x = 19,291,080,125.53/159,347.78
  6. Step 6: Final answer
    x = 121,062.75

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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.