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Finding the Fourth Proportional to 242,643,391, 363,965,086.50 and 81,085,327

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Solution

The fourth proportional to 242,643,391, 363,965,086.50 and 81,085,327 is: 121,627,990.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,643,391 : 363,965,086.50 = 81,085,327 : x
  2. Step 2: Convert to fraction form
    242,643,391/363,965,086.50 = 81,085,327/x
  3. Step 3: Cross multiply
    242,643,391x = 363,965,086.50 × 81,085,327
  4. Step 4: Simplify right side
    242,643,391x = 29,512,228,055,435,784
  5. Step 5: Solve for x
    x = 29,512,228,055,435,784/242,643,391
  6. Step 6: Final answer
    x = 121,627,990.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.