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Finding the Fourth Proportional to 159,410.13, 219,983.56 and 87,790.15

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Solution

The fourth proportional to 159,410.13, 219,983.56 and 87,790.15 is: 121,149.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,410.13 : 219,983.56 = 87,790.15 : x
  2. Step 2: Convert to fraction form
    159,410.13/219,983.56 = 87,790.15/x
  3. Step 3: Cross multiply
    159,410.13x = 219,983.56 × 87,790.15
  4. Step 4: Simplify right side
    159,410.13x = 19,312,389,729.93
  5. Step 5: Solve for x
    x = 19,312,389,729.93/159,410.13
  6. Step 6: Final answer
    x = 121,149.07

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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.