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Finding the Fourth Proportional to 81,739.28, 112,800.12 and 47,771.12

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Solution

The fourth proportional to 81,739.28, 112,800.12 and 47,771.12 is: 65,924.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,739.28 : 112,800.12 = 47,771.12 : x
  2. Step 2: Convert to fraction form
    81,739.28/112,800.12 = 47,771.12/x
  3. Step 3: Cross multiply
    81,739.28x = 112,800.12 × 47,771.12
  4. Step 4: Simplify right side
    81,739.28x = 5,388,588,068.53
  5. Step 5: Solve for x
    x = 5,388,588,068.53/81,739.28
  6. Step 6: Final answer
    x = 65,924.10

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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.