Home / 121,398.06-167,556.15-78,882.78

Finding the Fourth Proportional to 121,398.06, 167,556.15 and 78,882.78

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Solution

The fourth proportional to 121,398.06, 167,556.15 and 78,882.78 is: 108,875.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,398.06 : 167,556.15 = 78,882.78 : x
  2. Step 2: Convert to fraction form
    121,398.06/167,556.15 = 78,882.78/x
  3. Step 3: Cross multiply
    121,398.06x = 167,556.15 × 78,882.78
  4. Step 4: Simplify right side
    121,398.06x = 13,217,294,918.10
  5. Step 5: Solve for x
    x = 13,217,294,918.10/121,398.06
  6. Step 6: Final answer
    x = 108,875.67

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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.