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Finding the Fourth Proportional to 84,088.80, 115,981.56 and 57,183.48

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Solution

The fourth proportional to 84,088.80, 115,981.56 and 57,183.48 is: 78,871.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,088.80 : 115,981.56 = 57,183.48 : x
  2. Step 2: Convert to fraction form
    84,088.80/115,981.56 = 57,183.48/x
  3. Step 3: Cross multiply
    84,088.80x = 115,981.56 × 57,183.48
  4. Step 4: Simplify right side
    84,088.80x = 6,632,229,216.63
  5. Step 5: Solve for x
    x = 6,632,229,216.63/84,088.80
  6. Step 6: Final answer
    x = 78,871.73

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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.