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Finding the Fourth Proportional to 207,021.52, 310,532.13 and 66,780.15

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Solution

The fourth proportional to 207,021.52, 310,532.13 and 66,780.15 is: 100,170.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,021.52 : 310,532.13 = 66,780.15 : x
  2. Step 2: Convert to fraction form
    207,021.52/310,532.13 = 66,780.15/x
  3. Step 3: Cross multiply
    207,021.52x = 310,532.13 × 66,780.15
  4. Step 4: Simplify right side
    207,021.52x = 20,737,381,056.72
  5. Step 5: Solve for x
    x = 20,737,381,056.72/207,021.52
  6. Step 6: Final answer
    x = 100,170.17

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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.