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Finding the Fourth Proportional to 65,808.32, 90,809.91 and 38,946.08

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Solution

The fourth proportional to 65,808.32, 90,809.91 and 38,946.08 is: 53,742.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,808.32 : 90,809.91 = 38,946.08 : x
  2. Step 2: Convert to fraction form
    65,808.32/90,809.91 = 38,946.08/x
  3. Step 3: Cross multiply
    65,808.32x = 90,809.91 × 38,946.08
  4. Step 4: Simplify right side
    65,808.32x = 3,536,690,246.68
  5. Step 5: Solve for x
    x = 3,536,690,246.68/65,808.32
  6. Step 6: Final answer
    x = 53,742.30

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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.