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Finding the Fourth Proportional to 221,999.39, 306,154.73 and 145,490.61

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Solution

The fourth proportional to 221,999.39, 306,154.73 and 145,490.61 is: 200,643.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,999.39 : 306,154.73 = 145,490.61 : x
  2. Step 2: Convert to fraction form
    221,999.39/306,154.73 = 145,490.61/x
  3. Step 3: Cross multiply
    221,999.39x = 306,154.73 × 145,490.61
  4. Step 4: Simplify right side
    221,999.39x = 44,542,637,694.63
  5. Step 5: Solve for x
    x = 44,542,637,694.63/221,999.39
  6. Step 6: Final answer
    x = 200,643.07

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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.