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Finding the Fourth Proportional to 159,426.75, 220,018.90 and 87,806.75

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Solution

The fourth proportional to 159,426.75, 220,018.90 and 87,806.75 is: 121,178.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,426.75 : 220,018.90 = 87,806.75 : x
  2. Step 2: Convert to fraction form
    159,426.75/220,018.90 = 87,806.75/x
  3. Step 3: Cross multiply
    159,426.75x = 220,018.90 × 87,806.75
  4. Step 4: Simplify right side
    159,426.75x = 19,319,144,878.11
  5. Step 5: Solve for x
    x = 19,319,144,878.11/159,426.75
  6. Step 6: Final answer
    x = 121,178.82

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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.