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Finding the Fourth Proportional to 65,716.60, 98,520.90 and 28,305.40

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Solution

The fourth proportional to 65,716.60, 98,520.90 and 28,305.40 is: 42,434.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,716.60 : 98,520.90 = 28,305.40 : x
  2. Step 2: Convert to fraction form
    65,716.60/98,520.90 = 28,305.40/x
  3. Step 3: Cross multiply
    65,716.60x = 98,520.90 × 28,305.40
  4. Step 4: Simplify right side
    65,716.60x = 2,788,673,482.86
  5. Step 5: Solve for x
    x = 2,788,673,482.86/65,716.60
  6. Step 6: Final answer
    x = 42,434.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.