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Finding the Fourth Proportional to 124,878.84, 172,334.16 and 68,289

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Solution

The fourth proportional to 124,878.84, 172,334.16 and 68,289 is: 94,239.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,878.84 : 172,334.16 = 68,289 : x
  2. Step 2: Convert to fraction form
    124,878.84/172,334.16 = 68,289/x
  3. Step 3: Cross multiply
    124,878.84x = 172,334.16 × 68,289
  4. Step 4: Simplify right side
    124,878.84x = 11,768,527,452.24
  5. Step 5: Solve for x
    x = 11,768,527,452.24/124,878.84
  6. Step 6: Final answer
    x = 94,239.56

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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.