Home / 121,581.98-167,872.02-78,586.91

Finding the Fourth Proportional to 121,581.98, 167,872.02 and 78,586.91

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Solution

The fourth proportional to 121,581.98, 167,872.02 and 78,586.91 is: 108,507.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,581.98 : 167,872.02 = 78,586.91 : x
  2. Step 2: Convert to fraction form
    121,581.98/167,872.02 = 78,586.91/x
  3. Step 3: Cross multiply
    121,581.98x = 167,872.02 × 78,586.91
  4. Step 4: Simplify right side
    121,581.98x = 13,192,543,327.26
  5. Step 5: Solve for x
    x = 13,192,543,327.26/121,581.98
  6. Step 6: Final answer
    x = 108,507.39

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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.