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Finding the Fourth Proportional to 134,978.80, 186,272.14 and 74,550.96

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Solution

The fourth proportional to 134,978.80, 186,272.14 and 74,550.96 is: 102,881.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,978.80 : 186,272.14 = 74,550.96 : x
  2. Step 2: Convert to fraction form
    134,978.80/186,272.14 = 74,550.96/x
  3. Step 3: Cross multiply
    134,978.80x = 186,272.14 × 74,550.96
  4. Step 4: Simplify right side
    134,978.80x = 13,886,766,858.25
  5. Step 5: Solve for x
    x = 13,886,766,858.25/134,978.80
  6. Step 6: Final answer
    x = 102,881.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.