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Finding the Fourth Proportional to 65,416.64, 90,244.80 and 38,540.84

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Solution

The fourth proportional to 65,416.64, 90,244.80 and 38,540.84 is: 53,168.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,416.64 : 90,244.80 = 38,540.84 : x
  2. Step 2: Convert to fraction form
    65,416.64/90,244.80 = 38,540.84/x
  3. Step 3: Cross multiply
    65,416.64x = 90,244.80 × 38,540.84
  4. Step 4: Simplify right side
    65,416.64x = 3,478,109,946.41
  5. Step 5: Solve for x
    x = 3,478,109,946.41/65,416.64
  6. Step 6: Final answer
    x = 53,168.59

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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.