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Finding the Fourth Proportional to 65,478.63, 90,356.25 and 38,614.98

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Solution

The fourth proportional to 65,478.63, 90,356.25 and 38,614.98 is: 53,286.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,478.63 : 90,356.25 = 38,614.98 : x
  2. Step 2: Convert to fraction form
    65,478.63/90,356.25 = 38,614.98/x
  3. Step 3: Cross multiply
    65,478.63x = 90,356.25 × 38,614.98
  4. Step 4: Simplify right side
    65,478.63x = 3,489,104,334.84
  5. Step 5: Solve for x
    x = 3,489,104,334.84/65,478.63
  6. Step 6: Final answer
    x = 53,286.16

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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.