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Finding the Fourth Proportional to 65,789.78, 98,685.59 and 21,416.76

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Solution

The fourth proportional to 65,789.78, 98,685.59 and 21,416.76 is: 32,125.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,789.78 : 98,685.59 = 21,416.76 : x
  2. Step 2: Convert to fraction form
    65,789.78/98,685.59 = 21,416.76/x
  3. Step 3: Cross multiply
    65,789.78x = 98,685.59 × 21,416.76
  4. Step 4: Simplify right side
    65,789.78x = 2,113,525,489.40
  5. Step 5: Solve for x
    x = 2,113,525,489.40/65,789.78
  6. Step 6: Final answer
    x = 32,125.44

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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.