Home / 57,109.62-78,820.64-39,189.90

Finding the Fourth Proportional to 57,109.62, 78,820.64 and 39,189.90

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Solution

The fourth proportional to 57,109.62, 78,820.64 and 39,189.90 is: 54,088.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,109.62 : 78,820.64 = 39,189.90 : x
  2. Step 2: Convert to fraction form
    57,109.62/78,820.64 = 39,189.90/x
  3. Step 3: Cross multiply
    57,109.62x = 78,820.64 × 39,189.90
  4. Step 4: Simplify right side
    57,109.62x = 3,088,972,999.54
  5. Step 5: Solve for x
    x = 3,088,972,999.54/57,109.62
  6. Step 6: Final answer
    x = 54,088.49

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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.