Home / 78,781.44-108,719.86-42,972.74

Finding the Fourth Proportional to 78,781.44, 108,719.86 and 42,972.74

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Solution

The fourth proportional to 78,781.44, 108,719.86 and 42,972.74 is: 59,303.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,781.44 : 108,719.86 = 42,972.74 : x
  2. Step 2: Convert to fraction form
    78,781.44/108,719.86 = 42,972.74/x
  3. Step 3: Cross multiply
    78,781.44x = 108,719.86 × 42,972.74
  4. Step 4: Simplify right side
    78,781.44x = 4,671,989,625.59
  5. Step 5: Solve for x
    x = 4,671,989,625.59/78,781.44
  6. Step 6: Final answer
    x = 59,303.18

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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.