Home / 91,326.15-136,989.47-28,144.23

Finding the Fourth Proportional to 91,326.15, 136,989.47 and 28,144.23

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Solution

The fourth proportional to 91,326.15, 136,989.47 and 28,144.23 is: 42,216.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,326.15 : 136,989.47 = 28,144.23 : x
  2. Step 2: Convert to fraction form
    91,326.15/136,989.47 = 28,144.23/x
  3. Step 3: Cross multiply
    91,326.15x = 136,989.47 × 28,144.23
  4. Step 4: Simplify right side
    91,326.15x = 3,855,463,221.62
  5. Step 5: Solve for x
    x = 3,855,463,221.62/91,326.15
  6. Step 6: Final answer
    x = 42,216.42

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Double scale
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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.