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Finding the Fourth Proportional to 61,458.60, 91,969.20 and 42,650.40

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Solution

The fourth proportional to 61,458.60, 91,969.20 and 42,650.40 is: 63,823.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,458.60 : 91,969.20 = 42,650.40 : x
  2. Step 2: Convert to fraction form
    61,458.60/91,969.20 = 42,650.40/x
  3. Step 3: Cross multiply
    61,458.60x = 91,969.20 × 42,650.40
  4. Step 4: Simplify right side
    61,458.60x = 3,922,523,167.68
  5. Step 5: Solve for x
    x = 3,922,523,167.68/61,458.60
  6. Step 6: Final answer
    x = 63,823.83

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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.