Home / 121,570.48-167,856.14-78,575.41

Finding the Fourth Proportional to 121,570.48, 167,856.14 and 78,575.41

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Solution

The fourth proportional to 121,570.48, 167,856.14 and 78,575.41 is: 108,491.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,570.48 : 167,856.14 = 78,575.41 : x
  2. Step 2: Convert to fraction form
    121,570.48/167,856.14 = 78,575.41/x
  3. Step 3: Cross multiply
    121,570.48x = 167,856.14 × 78,575.41
  4. Step 4: Simplify right side
    121,570.48x = 13,189,365,021.52
  5. Step 5: Solve for x
    x = 13,189,365,021.52/121,570.48
  6. Step 6: Final answer
    x = 108,491.51

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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.