Home / 258,272.17-387,417-68,732.72

Finding the Fourth Proportional to 258,272.17, 387,417 and 68,732.72

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Solution

The fourth proportional to 258,272.17, 387,417 and 68,732.72 is: 103,101.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,272.17 : 387,417 = 68,732.72 : x
  2. Step 2: Convert to fraction form
    258,272.17/387,417 = 68,732.72/x
  3. Step 3: Cross multiply
    258,272.17x = 387,417 × 68,732.72
  4. Step 4: Simplify right side
    258,272.17x = 26,628,224,184.24
  5. Step 5: Solve for x
    x = 26,628,224,184.24/258,272.17
  6. Step 6: Final answer
    x = 103,101.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.