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Finding the Fourth Proportional to 65,108.75, 89,856.77 and 39,616.97

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Solution

The fourth proportional to 65,108.75, 89,856.77 and 39,616.97 is: 54,675.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,108.75 : 89,856.77 = 39,616.97 : x
  2. Step 2: Convert to fraction form
    65,108.75/89,856.77 = 39,616.97/x
  3. Step 3: Cross multiply
    65,108.75x = 89,856.77 × 39,616.97
  4. Step 4: Simplify right side
    65,108.75x = 3,559,852,314.02
  5. Step 5: Solve for x
    x = 3,559,852,314.02/65,108.75
  6. Step 6: Final answer
    x = 54,675.49

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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.