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Finding the Fourth Proportional to 158,975.26, 219,401.12 and 90,978.66

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Solution

The fourth proportional to 158,975.26, 219,401.12 and 90,978.66 is: 125,559.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,975.26 : 219,401.12 = 90,978.66 : x
  2. Step 2: Convert to fraction form
    158,975.26/219,401.12 = 90,978.66/x
  3. Step 3: Cross multiply
    158,975.26x = 219,401.12 × 90,978.66
  4. Step 4: Simplify right side
    158,975.26x = 19,960,820,127.55
  5. Step 5: Solve for x
    x = 19,960,820,127.55/158,975.26
  6. Step 6: Final answer
    x = 125,559.29

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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.