Home / 121,569.53-167,854.82-78,574.46

Finding the Fourth Proportional to 121,569.53, 167,854.82 and 78,574.46

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Solution

The fourth proportional to 121,569.53, 167,854.82 and 78,574.46 is: 108,490.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,569.53 : 167,854.82 = 78,574.46 : x
  2. Step 2: Convert to fraction form
    121,569.53/167,854.82 = 78,574.46/x
  3. Step 3: Cross multiply
    121,569.53x = 167,854.82 × 78,574.46
  4. Step 4: Simplify right side
    121,569.53x = 13,189,100,607.75
  5. Step 5: Solve for x
    x = 13,189,100,607.75/121,569.53
  6. Step 6: Final answer
    x = 108,490.19

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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.