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Finding the Fourth Proportional to 70,837.67, 106,239.49 and 20,904.28

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Solution

The fourth proportional to 70,837.67, 106,239.49 and 20,904.28 is: 31,351.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,837.67 : 106,239.49 = 20,904.28 : x
  2. Step 2: Convert to fraction form
    70,837.67/106,239.49 = 20,904.28/x
  3. Step 3: Cross multiply
    70,837.67x = 106,239.49 × 20,904.28
  4. Step 4: Simplify right side
    70,837.67x = 2,220,860,046.02
  5. Step 5: Solve for x
    x = 2,220,860,046.02/70,837.67
  6. Step 6: Final answer
    x = 31,351.40

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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.