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Finding the Fourth Proportional to 81,810.88, 112,845.18 and 69,680.32

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Solution

The fourth proportional to 81,810.88, 112,845.18 and 69,680.32 is: 96,112.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,810.88 : 112,845.18 = 69,680.32 : x
  2. Step 2: Convert to fraction form
    81,810.88/112,845.18 = 69,680.32/x
  3. Step 3: Cross multiply
    81,810.88x = 112,845.18 × 69,680.32
  4. Step 4: Simplify right side
    81,810.88x = 7,863,088,252.86
  5. Step 5: Solve for x
    x = 7,863,088,252.86/81,810.88
  6. Step 6: Final answer
    x = 96,112.99

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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.