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Finding the Fourth Proportional to 81,563.60, 112,561.80 and 45,751.76

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Solution

The fourth proportional to 81,563.60, 112,561.80 and 45,751.76 is: 63,139.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,563.60 : 112,561.80 = 45,751.76 : x
  2. Step 2: Convert to fraction form
    81,563.60/112,561.80 = 45,751.76/x
  3. Step 3: Cross multiply
    81,563.60x = 112,561.80 × 45,751.76
  4. Step 4: Simplify right side
    81,563.60x = 5,149,900,458.77
  5. Step 5: Solve for x
    x = 5,149,900,458.77/81,563.60
  6. Step 6: Final answer
    x = 63,139.69

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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.