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Finding the Fourth Proportional to 221,039.18, 305,041.39 and 124,259.87

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Solution

The fourth proportional to 221,039.18, 305,041.39 and 124,259.87 is: 171,482.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,039.18 : 305,041.39 = 124,259.87 : x
  2. Step 2: Convert to fraction form
    221,039.18/305,041.39 = 124,259.87/x
  3. Step 3: Cross multiply
    221,039.18x = 305,041.39 × 124,259.87
  4. Step 4: Simplify right side
    221,039.18x = 37,904,404,616.93
  5. Step 5: Solve for x
    x = 37,904,404,616.93/221,039.18
  6. Step 6: Final answer
    x = 171,482.74

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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.