Home / 77,125.40-115,688.10-39,633.20

Finding the Fourth Proportional to 77,125.40, 115,688.10 and 39,633.20

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Solution

The fourth proportional to 77,125.40, 115,688.10 and 39,633.20 is: 59,449.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,125.40 : 115,688.10 = 39,633.20 : x
  2. Step 2: Convert to fraction form
    77,125.40/115,688.10 = 39,633.20/x
  3. Step 3: Cross multiply
    77,125.40x = 115,688.10 × 39,633.20
  4. Step 4: Simplify right side
    77,125.40x = 4,585,089,604.92
  5. Step 5: Solve for x
    x = 4,585,089,604.92/77,125.40
  6. Step 6: Final answer
    x = 59,449.80

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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.