Home / 78,447.15-108,257.07-42,637.15

Finding the Fourth Proportional to 78,447.15, 108,257.07 and 42,637.15

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Solution

The fourth proportional to 78,447.15, 108,257.07 and 42,637.15 is: 58,839.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,447.15 : 108,257.07 = 42,637.15 : x
  2. Step 2: Convert to fraction form
    78,447.15/108,257.07 = 42,637.15/x
  3. Step 3: Cross multiply
    78,447.15x = 108,257.07 × 42,637.15
  4. Step 4: Simplify right side
    78,447.15x = 4,615,772,932.15
  5. Step 5: Solve for x
    x = 4,615,772,932.15/78,447.15
  6. Step 6: Final answer
    x = 58,839.27

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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.