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Finding the Fourth Proportional to 54,645,404.86, 81,968,459.61 and 21,858,712.79

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Solution

The fourth proportional to 54,645,404.86, 81,968,459.61 and 21,858,712.79 is: 32,788,210.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,645,404.86 : 81,968,459.61 = 21,858,712.79 : x
  2. Step 2: Convert to fraction form
    54,645,404.86/81,968,459.61 = 21,858,712.79/x
  3. Step 3: Cross multiply
    54,645,404.86x = 81,968,459.61 × 21,858,712.79
  4. Step 4: Simplify right side
    54,645,404.86x = 1,791,725,016,125,833.25
  5. Step 5: Solve for x
    x = 1,791,725,016,125,833.25/54,645,404.86
  6. Step 6: Final answer
    x = 32,788,210.11

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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.