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Finding the Fourth Proportional to 158,721.11, 219,037.80 and 87,107.80

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Solution

The fourth proportional to 158,721.11, 219,037.80 and 87,107.80 is: 120,210.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,721.11 : 219,037.80 = 87,107.80 : x
  2. Step 2: Convert to fraction form
    158,721.11/219,037.80 = 87,107.80/x
  3. Step 3: Cross multiply
    158,721.11x = 219,037.80 × 87,107.80
  4. Step 4: Simplify right side
    158,721.11x = 19,079,899,779.65
  5. Step 5: Solve for x
    x = 19,079,899,779.65/158,721.11
  6. Step 6: Final answer
    x = 120,210.22

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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.