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Finding the Fourth Proportional to 210,073.62, 315,109.92 and 90,052.76

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Solution

The fourth proportional to 210,073.62, 315,109.92 and 90,052.76 is: 135,078.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,073.62 : 315,109.92 = 90,052.76 : x
  2. Step 2: Convert to fraction form
    210,073.62/315,109.92 = 90,052.76/x
  3. Step 3: Cross multiply
    210,073.62x = 315,109.92 × 90,052.76
  4. Step 4: Simplify right side
    210,073.62x = 28,376,517,999.38
  5. Step 5: Solve for x
    x = 28,376,517,999.38/210,073.62
  6. Step 6: Final answer
    x = 135,078.92

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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.