Home / 124,731.46-172,129.53-68,143.78

Finding the Fourth Proportional to 124,731.46, 172,129.53 and 68,143.78

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Solution

The fourth proportional to 124,731.46, 172,129.53 and 68,143.78 is: 94,038.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,731.46 : 172,129.53 = 68,143.78 : x
  2. Step 2: Convert to fraction form
    124,731.46/172,129.53 = 68,143.78/x
  3. Step 3: Cross multiply
    124,731.46x = 172,129.53 × 68,143.78
  4. Step 4: Simplify right side
    124,731.46x = 11,729,556,823.82
  5. Step 5: Solve for x
    x = 11,729,556,823.82/124,731.46
  6. Step 6: Final answer
    x = 94,038.48

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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.