Home / 77,018.20-115,440.90-39,563.80

Finding the Fourth Proportional to 77,018.20, 115,440.90 and 39,563.80

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Solution

The fourth proportional to 77,018.20, 115,440.90 and 39,563.80 is: 59,301.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,018.20 : 115,440.90 = 39,563.80 : x
  2. Step 2: Convert to fraction form
    77,018.20/115,440.90 = 39,563.80/x
  3. Step 3: Cross multiply
    77,018.20x = 115,440.90 × 39,563.80
  4. Step 4: Simplify right side
    77,018.20x = 4,567,280,679.42
  5. Step 5: Solve for x
    x = 4,567,280,679.42/77,018.20
  6. Step 6: Final answer
    x = 59,301.32

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1.5x scale

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.