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Finding the Fourth Proportional to 125,339.78, 188,129.04 and 77,811.02

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Solution

The fourth proportional to 125,339.78, 188,129.04 and 77,811.02 is: 116,790.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,339.78 : 188,129.04 = 77,811.02 : x
  2. Step 2: Convert to fraction form
    125,339.78/188,129.04 = 77,811.02/x
  3. Step 3: Cross multiply
    125,339.78x = 188,129.04 × 77,811.02
  4. Step 4: Simplify right side
    125,339.78x = 14,638,511,967.07
  5. Step 5: Solve for x
    x = 14,638,511,967.07/125,339.78
  6. Step 6: Final answer
    x = 116,790.63

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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.