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Finding the Fourth Proportional to 65,478.84, 98,218.44 and 21,108.84

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Solution

The fourth proportional to 65,478.84, 98,218.44 and 21,108.84 is: 31,663.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,478.84 : 98,218.44 = 21,108.84 : x
  2. Step 2: Convert to fraction form
    65,478.84/98,218.44 = 21,108.84/x
  3. Step 3: Cross multiply
    65,478.84x = 98,218.44 × 21,108.84
  4. Step 4: Simplify right side
    65,478.84x = 2,073,277,335.01
  5. Step 5: Solve for x
    x = 2,073,277,335.01/65,478.84
  6. Step 6: Final answer
    x = 31,663.32

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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.