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Finding the Fourth Proportional to 91,992.88, 138,036.30 and 39,388.24

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Solution

The fourth proportional to 91,992.88, 138,036.30 and 39,388.24 is: 59,102.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,992.88 : 138,036.30 = 39,388.24 : x
  2. Step 2: Convert to fraction form
    91,992.88/138,036.30 = 39,388.24/x
  3. Step 3: Cross multiply
    91,992.88x = 138,036.30 × 39,388.24
  4. Step 4: Simplify right side
    91,992.88x = 5,437,006,913.11
  5. Step 5: Solve for x
    x = 5,437,006,913.11/91,992.88
  6. Step 6: Final answer
    x = 59,102.48

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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.