Home / 50,478.12-69,661.38-28,971.78

Finding the Fourth Proportional to 50,478.12, 69,661.38 and 28,971.78

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Solution

The fourth proportional to 50,478.12, 69,661.38 and 28,971.78 is: 39,981.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,478.12 : 69,661.38 = 28,971.78 : x
  2. Step 2: Convert to fraction form
    50,478.12/69,661.38 = 28,971.78/x
  3. Step 3: Cross multiply
    50,478.12x = 69,661.38 × 28,971.78
  4. Step 4: Simplify right side
    50,478.12x = 2,018,214,175.86
  5. Step 5: Solve for x
    x = 2,018,214,175.86/50,478.12
  6. Step 6: Final answer
    x = 39,981.96

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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.