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Finding the Fourth Proportional to 65,785.78, 98,679.59 and 21,412.76

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Solution

The fourth proportional to 65,785.78, 98,679.59 and 21,412.76 is: 32,119.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,785.78 : 98,679.59 = 21,412.76 : x
  2. Step 2: Convert to fraction form
    65,785.78/98,679.59 = 21,412.76/x
  3. Step 3: Cross multiply
    65,785.78x = 98,679.59 × 21,412.76
  4. Step 4: Simplify right side
    65,785.78x = 2,113,002,270.50
  5. Step 5: Solve for x
    x = 2,113,002,270.50/65,785.78
  6. Step 6: Final answer
    x = 32,119.44

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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.