Home / 121,158.46-167,217.48-72,787.32

Finding the Fourth Proportional to 121,158.46, 167,217.48 and 72,787.32

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Solution

The fourth proportional to 121,158.46, 167,217.48 and 72,787.32 is: 100,457.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,158.46 : 167,217.48 = 72,787.32 : x
  2. Step 2: Convert to fraction form
    121,158.46/167,217.48 = 72,787.32/x
  3. Step 3: Cross multiply
    121,158.46x = 167,217.48 × 72,787.32
  4. Step 4: Simplify right side
    121,158.46x = 12,171,311,026.33
  5. Step 5: Solve for x
    x = 12,171,311,026.33/121,158.46
  6. Step 6: Final answer
    x = 100,457.79

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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.