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Finding the Fourth Proportional to 61,356.22, 91,978.97 and 42,645.07

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Solution

The fourth proportional to 61,356.22, 91,978.97 and 42,645.07 is: 63,929.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,356.22 : 91,978.97 = 42,645.07 : x
  2. Step 2: Convert to fraction form
    61,356.22/91,978.97 = 42,645.07/x
  3. Step 3: Cross multiply
    61,356.22x = 91,978.97 × 42,645.07
  4. Step 4: Simplify right side
    61,356.22x = 3,922,449,614.18
  5. Step 5: Solve for x
    x = 3,922,449,614.18/61,356.22
  6. Step 6: Final answer
    x = 63,929.13

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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.