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Finding the Fourth Proportional to 221,368.71, 305,488.86 and 125,881.25

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Solution

The fourth proportional to 221,368.71, 305,488.86 and 125,881.25 is: 173,716.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,368.71 : 305,488.86 = 125,881.25 : x
  2. Step 2: Convert to fraction form
    221,368.71/305,488.86 = 125,881.25/x
  3. Step 3: Cross multiply
    221,368.71x = 305,488.86 × 125,881.25
  4. Step 4: Simplify right side
    221,368.71x = 38,455,319,557.88
  5. Step 5: Solve for x
    x = 38,455,319,557.88/221,368.71
  6. Step 6: Final answer
    x = 173,716.15

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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.