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Finding the Fourth Proportional to 65,753.64, 90,752.40 and 38,895.12

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Solution

The fourth proportional to 65,753.64, 90,752.40 and 38,895.12 is: 53,682.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,753.64 : 90,752.40 = 38,895.12 : x
  2. Step 2: Convert to fraction form
    65,753.64/90,752.40 = 38,895.12/x
  3. Step 3: Cross multiply
    65,753.64x = 90,752.40 × 38,895.12
  4. Step 4: Simplify right side
    65,753.64x = 3,529,825,488.29
  5. Step 5: Solve for x
    x = 3,529,825,488.29/65,753.64
  6. Step 6: Final answer
    x = 53,682.59

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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.