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Finding the Fourth Proportional to 159,306.48, 219,835.08 and 87,692.76

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Solution

The fourth proportional to 159,306.48, 219,835.08 and 87,692.76 is: 121,011.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,306.48 : 219,835.08 = 87,692.76 : x
  2. Step 2: Convert to fraction form
    159,306.48/219,835.08 = 87,692.76/x
  3. Step 3: Cross multiply
    159,306.48x = 219,835.08 × 87,692.76
  4. Step 4: Simplify right side
    159,306.48x = 19,277,944,910.02
  5. Step 5: Solve for x
    x = 19,277,944,910.02/159,306.48
  6. Step 6: Final answer
    x = 121,011.68

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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.