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Finding the Fourth Proportional to 60,978.90, 91,468.35 and 40,197.54

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Solution

The fourth proportional to 60,978.90, 91,468.35 and 40,197.54 is: 60,296.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,978.90 : 91,468.35 = 40,197.54 : x
  2. Step 2: Convert to fraction form
    60,978.90/91,468.35 = 40,197.54/x
  3. Step 3: Cross multiply
    60,978.90x = 91,468.35 × 40,197.54
  4. Step 4: Simplify right side
    60,978.90x = 3,676,802,657.86
  5. Step 5: Solve for x
    x = 3,676,802,657.86/60,978.90
  6. Step 6: Final answer
    x = 60,296.31

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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.