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Finding the Fourth Proportional to 159,215.28, 219,710.16 and 87,590.76

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Solution

The fourth proportional to 159,215.28, 219,710.16 and 87,590.76 is: 120,871.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,215.28 : 219,710.16 = 87,590.76 : x
  2. Step 2: Convert to fraction form
    159,215.28/219,710.16 = 87,590.76/x
  3. Step 3: Cross multiply
    159,215.28x = 219,710.16 × 87,590.76
  4. Step 4: Simplify right side
    159,215.28x = 19,244,579,894.12
  5. Step 5: Solve for x
    x = 19,244,579,894.12/159,215.28
  6. Step 6: Final answer
    x = 120,871.44

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1.5x scale

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.