Home / 85,975.10-128,964.20-29,817.20

Finding the Fourth Proportional to 85,975.10, 128,964.20 and 29,817.20

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Solution

The fourth proportional to 85,975.10, 128,964.20 and 29,817.20 is: 44,726.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,975.10 : 128,964.20 = 29,817.20 : x
  2. Step 2: Convert to fraction form
    85,975.10/128,964.20 = 29,817.20/x
  3. Step 3: Cross multiply
    85,975.10x = 128,964.20 × 29,817.20
  4. Step 4: Simplify right side
    85,975.10x = 3,845,350,550.33
  5. Step 5: Solve for x
    x = 3,845,350,550.33/85,975.10
  6. Step 6: Final answer
    x = 44,726.33

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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.