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Finding the Fourth Proportional to 107,720.68, 148,679.22 and 69,929.32

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Solution

The fourth proportional to 107,720.68, 148,679.22 and 69,929.32 is: 96,518.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,720.68 : 148,679.22 = 69,929.32 : x
  2. Step 2: Convert to fraction form
    107,720.68/148,679.22 = 69,929.32/x
  3. Step 3: Cross multiply
    107,720.68x = 148,679.22 × 69,929.32
  4. Step 4: Simplify right side
    107,720.68x = 10,397,036,752.73
  5. Step 5: Solve for x
    x = 10,397,036,752.73/107,720.68
  6. Step 6: Final answer
    x = 96,518.48

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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.