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Finding the Fourth Proportional to 100,626.02, 138,877.07 and 64,919.89

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Solution

The fourth proportional to 100,626.02, 138,877.07 and 64,919.89 is: 89,597.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,626.02 : 138,877.07 = 64,919.89 : x
  2. Step 2: Convert to fraction form
    100,626.02/138,877.07 = 64,919.89/x
  3. Step 3: Cross multiply
    100,626.02x = 138,877.07 × 64,919.89
  4. Step 4: Simplify right side
    100,626.02x = 9,015,884,107.92
  5. Step 5: Solve for x
    x = 9,015,884,107.92/100,626.02
  6. Step 6: Final answer
    x = 89,597.94

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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.