Home / 81,972.76-112,385.08-80,478.32

Finding the Fourth Proportional to 81,972.76, 112,385.08 and 80,478.32

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Solution

The fourth proportional to 81,972.76, 112,385.08 and 80,478.32 is: 110,336.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,972.76 : 112,385.08 = 80,478.32 : x
  2. Step 2: Convert to fraction form
    81,972.76/112,385.08 = 80,478.32/x
  3. Step 3: Cross multiply
    81,972.76x = 112,385.08 × 80,478.32
  4. Step 4: Simplify right side
    81,972.76x = 9,044,562,431.47
  5. Step 5: Solve for x
    x = 9,044,562,431.47/81,972.76
  6. Step 6: Final answer
    x = 110,336.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.