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Finding the Fourth Proportional to 221,316.88, 305,396.78 and 125,804.92

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Solution

The fourth proportional to 221,316.88, 305,396.78 and 125,804.92 is: 173,599.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,316.88 : 305,396.78 = 125,804.92 : x
  2. Step 2: Convert to fraction form
    221,316.88/305,396.78 = 125,804.92/x
  3. Step 3: Cross multiply
    221,316.88x = 305,396.78 × 125,804.92
  4. Step 4: Simplify right side
    221,316.88x = 38,420,417,476.16
  5. Step 5: Solve for x
    x = 38,420,417,476.16/221,316.88
  6. Step 6: Final answer
    x = 173,599.13

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1.5x scale

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.