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Finding the Fourth Proportional to 81,393.64, 112,340.58 and 47,878.76

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Solution

The fourth proportional to 81,393.64, 112,340.58 and 47,878.76 is: 66,082.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,393.64 : 112,340.58 = 47,878.76 : x
  2. Step 2: Convert to fraction form
    81,393.64/112,340.58 = 47,878.76/x
  3. Step 3: Cross multiply
    81,393.64x = 112,340.58 × 47,878.76
  4. Step 4: Simplify right side
    81,393.64x = 5,378,727,668.08
  5. Step 5: Solve for x
    x = 5,378,727,668.08/81,393.64
  6. Step 6: Final answer
    x = 66,082.90

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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.