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Finding the Fourth Proportional to 65,892.78, 90,928.44 and 39,037.77

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Solution

The fourth proportional to 65,892.78, 90,928.44 and 39,037.77 is: 53,869.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,892.78 : 90,928.44 = 39,037.77 : x
  2. Step 2: Convert to fraction form
    65,892.78/90,928.44 = 39,037.77/x
  3. Step 3: Cross multiply
    65,892.78x = 90,928.44 × 39,037.77
  4. Step 4: Simplify right side
    65,892.78x = 3,549,643,527.18
  5. Step 5: Solve for x
    x = 3,549,643,527.18/65,892.78
  6. Step 6: Final answer
    x = 53,869.99

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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.