Home / 55,781.60-76,979.18-30,288.20

Finding the Fourth Proportional to 55,781.60, 76,979.18 and 30,288.20

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Solution

The fourth proportional to 55,781.60, 76,979.18 and 30,288.20 is: 41,798.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,781.60 : 76,979.18 = 30,288.20 : x
  2. Step 2: Convert to fraction form
    55,781.60/76,979.18 = 30,288.20/x
  3. Step 3: Cross multiply
    55,781.60x = 76,979.18 × 30,288.20
  4. Step 4: Simplify right side
    55,781.60x = 2,331,560,263.34
  5. Step 5: Solve for x
    x = 2,331,560,263.34/55,781.60
  6. Step 6: Final answer
    x = 41,798.02

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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.