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Finding the Fourth Proportional to 215,851.40, 324,068.70 and 137,119.40

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Solution

The fourth proportional to 215,851.40, 324,068.70 and 137,119.40 is: 205,864.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,851.40 : 324,068.70 = 137,119.40 : x
  2. Step 2: Convert to fraction form
    215,851.40/324,068.70 = 137,119.40/x
  3. Step 3: Cross multiply
    215,851.40x = 324,068.70 × 137,119.40
  4. Step 4: Simplify right side
    215,851.40x = 44,436,105,702.78
  5. Step 5: Solve for x
    x = 44,436,105,702.78/215,851.40
  6. Step 6: Final answer
    x = 205,864.34

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1.5x scale

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.