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Finding the Fourth Proportional to 221,280.73, 305,314.91 and 125,779.91

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Solution

The fourth proportional to 221,280.73, 305,314.91 and 125,779.91 is: 173,546.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,280.73 : 305,314.91 = 125,779.91 : x
  2. Step 2: Convert to fraction form
    221,280.73/305,314.91 = 125,779.91/x
  3. Step 3: Cross multiply
    221,280.73x = 305,314.91 × 125,779.91
  4. Step 4: Simplify right side
    221,280.73x = 38,402,480,374.88
  5. Step 5: Solve for x
    x = 38,402,480,374.88/221,280.73
  6. Step 6: Final answer
    x = 173,546.43

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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.