Home / 121,421.13-167,561.16-71,120.13

Finding the Fourth Proportional to 121,421.13, 167,561.16 and 71,120.13

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Solution

The fourth proportional to 121,421.13, 167,561.16 and 71,120.13 is: 98,145.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,421.13 : 167,561.16 = 71,120.13 : x
  2. Step 2: Convert to fraction form
    121,421.13/167,561.16 = 71,120.13/x
  3. Step 3: Cross multiply
    121,421.13x = 167,561.16 × 71,120.13
  4. Step 4: Simplify right side
    121,421.13x = 11,916,970,288.74
  5. Step 5: Solve for x
    x = 11,916,970,288.74/121,421.13
  6. Step 6: Final answer
    x = 98,145.77

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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.