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Finding the Fourth Proportional to 77,720.97, 107,258.23 and 43,730.89

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Solution

The fourth proportional to 77,720.97, 107,258.23 and 43,730.89 is: 60,350.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,720.97 : 107,258.23 = 43,730.89 : x
  2. Step 2: Convert to fraction form
    77,720.97/107,258.23 = 43,730.89/x
  3. Step 3: Cross multiply
    77,720.97x = 107,258.23 × 43,730.89
  4. Step 4: Simplify right side
    77,720.97x = 4,690,497,398.26
  5. Step 5: Solve for x
    x = 4,690,497,398.26/77,720.97
  6. Step 6: Final answer
    x = 60,350.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.