Home / 121,100.32-167,049.36-72,689.36

Finding the Fourth Proportional to 121,100.32, 167,049.36 and 72,689.36

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Solution

The fourth proportional to 121,100.32, 167,049.36 and 72,689.36 is: 100,269.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,100.32 : 167,049.36 = 72,689.36 : x
  2. Step 2: Convert to fraction form
    121,100.32/167,049.36 = 72,689.36/x
  3. Step 3: Cross multiply
    121,100.32x = 167,049.36 × 72,689.36
  4. Step 4: Simplify right side
    121,100.32x = 12,142,711,066.81
  5. Step 5: Solve for x
    x = 12,142,711,066.81/121,100.32
  6. Step 6: Final answer
    x = 100,269.85

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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.