Home / 100,319.43-138,418.06-68,058.45

Finding the Fourth Proportional to 100,319.43, 138,418.06 and 68,058.45

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Solution

The fourth proportional to 100,319.43, 138,418.06 and 68,058.45 is: 93,905.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,319.43 : 138,418.06 = 68,058.45 : x
  2. Step 2: Convert to fraction form
    100,319.43/138,418.06 = 68,058.45/x
  3. Step 3: Cross multiply
    100,319.43x = 138,418.06 × 68,058.45
  4. Step 4: Simplify right side
    100,319.43x = 9,420,518,615.61
  5. Step 5: Solve for x
    x = 9,420,518,615.61/100,319.43
  6. Step 6: Final answer
    x = 93,905.22

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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.