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Finding the Fourth Proportional to 30,605,948.40, 45,802,634.40 and 21,040,010.40

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Solution

The fourth proportional to 30,605,948.40, 45,802,634.40 and 21,040,010.40 is: 31,486,947.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,605,948.40 : 45,802,634.40 = 21,040,010.40 : x
  2. Step 2: Convert to fraction form
    30,605,948.40/45,802,634.40 = 21,040,010.40/x
  3. Step 3: Cross multiply
    30,605,948.40x = 45,802,634.40 × 21,040,010.40
  4. Step 4: Simplify right side
    30,605,948.40x = 963,687,904,123,397.62
  5. Step 5: Solve for x
    x = 963,687,904,123,397.62/30,605,948.40
  6. Step 6: Final answer
    x = 31,486,947.95

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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.