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Finding the Fourth Proportional to 81,785.60, 112,876.08 and 45,978.56

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Solution

The fourth proportional to 81,785.60, 112,876.08 and 45,978.56 is: 63,457.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,785.60 : 112,876.08 = 45,978.56 : x
  2. Step 2: Convert to fraction form
    81,785.60/112,876.08 = 45,978.56/x
  3. Step 3: Cross multiply
    81,785.60x = 112,876.08 × 45,978.56
  4. Step 4: Simplify right side
    81,785.60x = 5,189,879,616.84
  5. Step 5: Solve for x
    x = 5,189,879,616.84/81,785.60
  6. Step 6: Final answer
    x = 63,457.13

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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.