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Finding the Fourth Proportional to 125,518.88, 188,278.39 and 78,804.56

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Solution

The fourth proportional to 125,518.88, 188,278.39 and 78,804.56 is: 118,206.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,518.88 : 188,278.39 = 78,804.56 : x
  2. Step 2: Convert to fraction form
    125,518.88/188,278.39 = 78,804.56/x
  3. Step 3: Cross multiply
    125,518.88x = 188,278.39 × 78,804.56
  4. Step 4: Simplify right side
    125,518.88x = 14,837,195,681.46
  5. Step 5: Solve for x
    x = 14,837,195,681.46/125,518.88
  6. Step 6: Final answer
    x = 118,206.88

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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.