Home / 57,129.64-78,756.74-40,081.06

Finding the Fourth Proportional to 57,129.64, 78,756.74 and 40,081.06

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Solution

The fourth proportional to 57,129.64, 78,756.74 and 40,081.06 is: 55,254.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,129.64 : 78,756.74 = 40,081.06 : x
  2. Step 2: Convert to fraction form
    57,129.64/78,756.74 = 40,081.06/x
  3. Step 3: Cross multiply
    57,129.64x = 78,756.74 × 40,081.06
  4. Step 4: Simplify right side
    57,129.64x = 3,156,653,669.69
  5. Step 5: Solve for x
    x = 3,156,653,669.69/57,129.64
  6. Step 6: Final answer
    x = 55,254.22

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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.