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Finding the Fourth Proportional to 159,347.90, 219,895.84 and 87,728.46

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Solution

The fourth proportional to 159,347.90, 219,895.84 and 87,728.46 is: 121,062.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,347.90 : 219,895.84 = 87,728.46 : x
  2. Step 2: Convert to fraction form
    159,347.90/219,895.84 = 87,728.46/x
  3. Step 3: Cross multiply
    159,347.90x = 219,895.84 × 87,728.46
  4. Step 4: Simplify right side
    159,347.90x = 19,291,123,184.29
  5. Step 5: Solve for x
    x = 19,291,123,184.29/159,347.90
  6. Step 6: Final answer
    x = 121,062.93

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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.