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Finding the Fourth Proportional to 81,680.94, 112,627.26 and 58,979.88

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Solution

The fourth proportional to 81,680.94, 112,627.26 and 58,979.88 is: 81,325.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,680.94 : 112,627.26 = 58,979.88 : x
  2. Step 2: Convert to fraction form
    81,680.94/112,627.26 = 58,979.88/x
  3. Step 3: Cross multiply
    81,680.94x = 112,627.26 × 58,979.88
  4. Step 4: Simplify right side
    81,680.94x = 6,642,742,279.53
  5. Step 5: Solve for x
    x = 6,642,742,279.53/81,680.94
  6. Step 6: Final answer
    x = 81,325.49

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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.