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Finding the Fourth Proportional to 65,808.16, 90,821.04 and 38,937.12

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Solution

The fourth proportional to 65,808.16, 90,821.04 and 38,937.12 is: 53,736.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,808.16 : 90,821.04 = 38,937.12 : x
  2. Step 2: Convert to fraction form
    65,808.16/90,821.04 = 38,937.12/x
  3. Step 3: Cross multiply
    65,808.16x = 90,821.04 × 38,937.12
  4. Step 4: Simplify right side
    65,808.16x = 3,536,309,733.00
  5. Step 5: Solve for x
    x = 3,536,309,733.00/65,808.16
  6. Step 6: Final answer
    x = 53,736.65

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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.