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Finding the Fourth Proportional to 112,992.40, 155,931.30 and 65,249.92

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Solution

The fourth proportional to 112,992.40, 155,931.30 and 65,249.92 is: 90,045.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,992.40 : 155,931.30 = 65,249.92 : x
  2. Step 2: Convert to fraction form
    112,992.40/155,931.30 = 65,249.92/x
  3. Step 3: Cross multiply
    112,992.40x = 155,931.30 × 65,249.92
  4. Step 4: Simplify right side
    112,992.40x = 10,174,504,850.50
  5. Step 5: Solve for x
    x = 10,174,504,850.50/112,992.40
  6. Step 6: Final answer
    x = 90,045.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.