Home / 87,975.18-121,308.57-79,475.04

Finding the Fourth Proportional to 87,975.18, 121,308.57 and 79,475.04

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Solution

The fourth proportional to 87,975.18, 121,308.57 and 79,475.04 is: 109,587.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,975.18 : 121,308.57 = 79,475.04 : x
  2. Step 2: Convert to fraction form
    87,975.18/121,308.57 = 79,475.04/x
  3. Step 3: Cross multiply
    87,975.18x = 121,308.57 × 79,475.04
  4. Step 4: Simplify right side
    87,975.18x = 9,641,003,453.09
  5. Step 5: Solve for x
    x = 9,641,003,453.09/87,975.18
  6. Step 6: Final answer
    x = 109,587.77

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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.