Home / 121,557.71-167,548.86-81,256.77

Finding the Fourth Proportional to 121,557.71, 167,548.86 and 81,256.77

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Solution

The fourth proportional to 121,557.71, 167,548.86 and 81,256.77 is: 112,000.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,557.71 : 167,548.86 = 81,256.77 : x
  2. Step 2: Convert to fraction form
    121,557.71/167,548.86 = 81,256.77/x
  3. Step 3: Cross multiply
    121,557.71x = 167,548.86 × 81,256.77
  4. Step 4: Simplify right side
    121,557.71x = 13,614,479,180.78
  5. Step 5: Solve for x
    x = 13,614,479,180.78/121,557.71
  6. Step 6: Final answer
    x = 112,000.13

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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.