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Finding the Fourth Proportional to 81,760.80, 112,810.19 and 47,749.98

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Solution

The fourth proportional to 81,760.80, 112,810.19 and 47,749.98 is: 65,883.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,760.80 : 112,810.19 = 47,749.98 : x
  2. Step 2: Convert to fraction form
    81,760.80/112,810.19 = 47,749.98/x
  3. Step 3: Cross multiply
    81,760.80x = 112,810.19 × 47,749.98
  4. Step 4: Simplify right side
    81,760.80x = 5,386,684,316.30
  5. Step 5: Solve for x
    x = 5,386,684,316.30/81,760.80
  6. Step 6: Final answer
    x = 65,883.46

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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.