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Finding the Fourth Proportional to 154,329.90, 212,974.11 and 87,264.30

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Solution

The fourth proportional to 154,329.90, 212,974.11 and 87,264.30 is: 120,424.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,329.90 : 212,974.11 = 87,264.30 : x
  2. Step 2: Convert to fraction form
    154,329.90/212,974.11 = 87,264.30/x
  3. Step 3: Cross multiply
    154,329.90x = 212,974.11 × 87,264.30
  4. Step 4: Simplify right side
    154,329.90x = 18,585,036,627.27
  5. Step 5: Solve for x
    x = 18,585,036,627.27/154,329.90
  6. Step 6: Final answer
    x = 120,424.08

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1.5x scale

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.