Home / 85,919.56-128,880.80-29,761.33

Finding the Fourth Proportional to 85,919.56, 128,880.80 and 29,761.33

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Solution

The fourth proportional to 85,919.56, 128,880.80 and 29,761.33 is: 44,642.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,919.56 : 128,880.80 = 29,761.33 : x
  2. Step 2: Convert to fraction form
    85,919.56/128,880.80 = 29,761.33/x
  3. Step 3: Cross multiply
    85,919.56x = 128,880.80 × 29,761.33
  4. Step 4: Simplify right side
    85,919.56x = 3,835,664,019.46
  5. Step 5: Solve for x
    x = 3,835,664,019.46/85,919.56
  6. Step 6: Final answer
    x = 44,642.50

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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.