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Finding the Fourth Proportional to 112,894.70, 155,776.97 and 65,138.92

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Solution

The fourth proportional to 112,894.70, 155,776.97 and 65,138.92 is: 89,881.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,894.70 : 155,776.97 = 65,138.92 : x
  2. Step 2: Convert to fraction form
    112,894.70/155,776.97 = 65,138.92/x
  3. Step 3: Cross multiply
    112,894.70x = 155,776.97 × 65,138.92
  4. Step 4: Simplify right side
    112,894.70x = 10,147,143,360.08
  5. Step 5: Solve for x
    x = 10,147,143,360.08/112,894.70
  6. Step 6: Final answer
    x = 89,881.49

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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.