Home / 85,845.20-128,767.80-23,515.70

Finding the Fourth Proportional to 85,845.20, 128,767.80 and 23,515.70

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Solution

The fourth proportional to 85,845.20, 128,767.80 and 23,515.70 is: 35,273.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,845.20 : 128,767.80 = 23,515.70 : x
  2. Step 2: Convert to fraction form
    85,845.20/128,767.80 = 23,515.70/x
  3. Step 3: Cross multiply
    85,845.20x = 128,767.80 × 23,515.70
  4. Step 4: Simplify right side
    85,845.20x = 3,028,064,954.46
  5. Step 5: Solve for x
    x = 3,028,064,954.46/85,845.20
  6. Step 6: Final answer
    x = 35,273.55

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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.