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Finding the Fourth Proportional to 65,781.90, 98,673.75 and 21,408.84

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Solution

The fourth proportional to 65,781.90, 98,673.75 and 21,408.84 is: 32,113.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,781.90 : 98,673.75 = 21,408.84 : x
  2. Step 2: Convert to fraction form
    65,781.90/98,673.75 = 21,408.84/x
  3. Step 3: Cross multiply
    65,781.90x = 98,673.75 × 21,408.84
  4. Step 4: Simplify right side
    65,781.90x = 2,112,490,525.95
  5. Step 5: Solve for x
    x = 2,112,490,525.95/65,781.90
  6. Step 6: Final answer
    x = 32,113.55

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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.