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Finding the Fourth Proportional to 65,710.60, 98,511.90 and 28,299.40

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Solution

The fourth proportional to 65,710.60, 98,511.90 and 28,299.40 is: 42,425.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,710.60 : 98,511.90 = 28,299.40 : x
  2. Step 2: Convert to fraction form
    65,710.60/98,511.90 = 28,299.40/x
  3. Step 3: Cross multiply
    65,710.60x = 98,511.90 × 28,299.40
  4. Step 4: Simplify right side
    65,710.60x = 2,787,827,662.86
  5. Step 5: Solve for x
    x = 2,787,827,662.86/65,710.60
  6. Step 6: Final answer
    x = 42,425.84

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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.