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Finding the Fourth Proportional to 55,539, 76,645.44 and 30,390.12

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Solution

The fourth proportional to 55,539, 76,645.44 and 30,390.12 is: 41,939.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,539 : 76,645.44 = 30,390.12 : x
  2. Step 2: Convert to fraction form
    55,539/76,645.44 = 30,390.12/x
  3. Step 3: Cross multiply
    55,539x = 76,645.44 × 30,390.12
  4. Step 4: Simplify right side
    55,539x = 2,329,264,119.05
  5. Step 5: Solve for x
    x = 2,329,264,119.05/55,539
  6. Step 6: Final answer
    x = 41,939.25

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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.