Home / 121,557.34-167,548.35-81,256.40

Finding the Fourth Proportional to 121,557.34, 167,548.35 and 81,256.40

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Solution

The fourth proportional to 121,557.34, 167,548.35 and 81,256.40 is: 111,999.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,557.34 : 167,548.35 = 81,256.40 : x
  2. Step 2: Convert to fraction form
    121,557.34/167,548.35 = 81,256.40/x
  3. Step 3: Cross multiply
    121,557.34x = 167,548.35 × 81,256.40
  4. Step 4: Simplify right side
    121,557.34x = 13,614,374,502.92
  5. Step 5: Solve for x
    x = 13,614,374,502.92/121,557.34
  6. Step 6: Final answer
    x = 111,999.61

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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.