Home / 131,981.62-182,132.40-74,620

Finding the Fourth Proportional to 131,981.62, 182,132.40 and 74,620

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Solution

The fourth proportional to 131,981.62, 182,132.40 and 74,620 is: 102,974.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,981.62 : 182,132.40 = 74,620 : x
  2. Step 2: Convert to fraction form
    131,981.62/182,132.40 = 74,620/x
  3. Step 3: Cross multiply
    131,981.62x = 182,132.40 × 74,620
  4. Step 4: Simplify right side
    131,981.62x = 13,590,719,688
  5. Step 5: Solve for x
    x = 13,590,719,688/131,981.62
  6. Step 6: Final answer
    x = 102,974.34

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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.