Home / 55,781.68-76,981.44-30,631.72

Finding the Fourth Proportional to 55,781.68, 76,981.44 and 30,631.72

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Solution

The fourth proportional to 55,781.68, 76,981.44 and 30,631.72 is: 42,273.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,781.68 : 76,981.44 = 30,631.72 : x
  2. Step 2: Convert to fraction form
    55,781.68/76,981.44 = 30,631.72/x
  3. Step 3: Cross multiply
    55,781.68x = 76,981.44 × 30,631.72
  4. Step 4: Simplify right side
    55,781.68x = 2,358,073,915.28
  5. Step 5: Solve for x
    x = 2,358,073,915.28/55,781.68
  6. Step 6: Final answer
    x = 42,273.27

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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.