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Finding the Fourth Proportional to 64,838.92, 89,433.30 and 39,700.84

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Solution

The fourth proportional to 64,838.92, 89,433.30 and 39,700.84 is: 54,759.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,838.92 : 89,433.30 = 39,700.84 : x
  2. Step 2: Convert to fraction form
    64,838.92/89,433.30 = 39,700.84/x
  3. Step 3: Cross multiply
    64,838.92x = 89,433.30 × 39,700.84
  4. Step 4: Simplify right side
    64,838.92x = 3,550,577,133.97
  5. Step 5: Solve for x
    x = 3,550,577,133.97/64,838.92
  6. Step 6: Final answer
    x = 54,759.97

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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.