Home / 51,129.80-76,707.42-40,639.40

Finding the Fourth Proportional to 51,129.80, 76,707.42 and 40,639.40

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Solution

The fourth proportional to 51,129.80, 76,707.42 and 40,639.40 is: 60,969.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,129.80 : 76,707.42 = 40,639.40 : x
  2. Step 2: Convert to fraction form
    51,129.80/76,707.42 = 40,639.40/x
  3. Step 3: Cross multiply
    51,129.80x = 76,707.42 × 40,639.40
  4. Step 4: Simplify right side
    51,129.80x = 3,117,343,524.35
  5. Step 5: Solve for x
    x = 3,117,343,524.35/51,129.80
  6. Step 6: Final answer
    x = 60,969.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.