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Finding the Fourth Proportional to 90,837.89, 137,110.07 and 90,837.89

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Solution

The fourth proportional to 90,837.89, 137,110.07 and 90,837.89 is: 137,110.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,837.89 : 137,110.07 = 90,837.89 : x
  2. Step 2: Convert to fraction form
    90,837.89/137,110.07 = 90,837.89/x
  3. Step 3: Cross multiply
    90,837.89x = 137,110.07 × 90,837.89
  4. Step 4: Simplify right side
    90,837.89x = 12,454,789,001.30
  5. Step 5: Solve for x
    x = 12,454,789,001.30/90,837.89
  6. Step 6: Final answer
    x = 137,110.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.