Home / 121,567.30-167,838.69-78,569.26

Finding the Fourth Proportional to 121,567.30, 167,838.69 and 78,569.26

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Solution

The fourth proportional to 121,567.30, 167,838.69 and 78,569.26 is: 108,474.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,567.30 : 167,838.69 = 78,569.26 : x
  2. Step 2: Convert to fraction form
    121,567.30/167,838.69 = 78,569.26/x
  3. Step 3: Cross multiply
    121,567.30x = 167,838.69 × 78,569.26
  4. Step 4: Simplify right side
    121,567.30x = 13,186,961,672.67
  5. Step 5: Solve for x
    x = 13,186,961,672.67/121,567.30
  6. Step 6: Final answer
    x = 108,474.58

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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.