Home / 158,720.91-219,041.18-87,103.50

Finding the Fourth Proportional to 158,720.91, 219,041.18 and 87,103.50

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Solution

The fourth proportional to 158,720.91, 219,041.18 and 87,103.50 is: 120,206.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,720.91 : 219,041.18 = 87,103.50 : x
  2. Step 2: Convert to fraction form
    158,720.91/219,041.18 = 87,103.50/x
  3. Step 3: Cross multiply
    158,720.91x = 219,041.18 × 87,103.50
  4. Step 4: Simplify right side
    158,720.91x = 19,079,253,422.13
  5. Step 5: Solve for x
    x = 19,079,253,422.13/158,720.91
  6. Step 6: Final answer
    x = 120,206.30

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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.