Home / 77,069.78-115,612.36-20,910.80

Finding the Fourth Proportional to 77,069.78, 115,612.36 and 20,910.80

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Solution

The fourth proportional to 77,069.78, 115,612.36 and 20,910.80 is: 31,368.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,069.78 : 115,612.36 = 20,910.80 : x
  2. Step 2: Convert to fraction form
    77,069.78/115,612.36 = 20,910.80/x
  3. Step 3: Cross multiply
    77,069.78x = 115,612.36 × 20,910.80
  4. Step 4: Simplify right side
    77,069.78x = 2,417,546,937.49
  5. Step 5: Solve for x
    x = 2,417,546,937.49/77,069.78
  6. Step 6: Final answer
    x = 31,368.29

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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.