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Finding the Fourth Proportional to 65,494.48, 90,393.32 and 38,643.64

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Solution

The fourth proportional to 65,494.48, 90,393.32 and 38,643.64 is: 53,334.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,494.48 : 90,393.32 = 38,643.64 : x
  2. Step 2: Convert to fraction form
    65,494.48/90,393.32 = 38,643.64/x
  3. Step 3: Cross multiply
    65,494.48x = 90,393.32 × 38,643.64
  4. Step 4: Simplify right side
    65,494.48x = 3,493,126,916.48
  5. Step 5: Solve for x
    x = 3,493,126,916.48/65,494.48
  6. Step 6: Final answer
    x = 53,334.68

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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.