Home / 81,132.18-112,039.08-76,714.44

Finding the Fourth Proportional to 81,132.18, 112,039.08 and 76,714.44

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Solution

The fourth proportional to 81,132.18, 112,039.08 and 76,714.44 is: 105,938.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,132.18 : 112,039.08 = 76,714.44 : x
  2. Step 2: Convert to fraction form
    81,132.18/112,039.08 = 76,714.44/x
  3. Step 3: Cross multiply
    81,132.18x = 112,039.08 × 76,714.44
  4. Step 4: Simplify right side
    81,132.18x = 8,595,015,280.32
  5. Step 5: Solve for x
    x = 8,595,015,280.32/81,132.18
  6. Step 6: Final answer
    x = 105,938.42

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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.