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Finding the Fourth Proportional to 31,006,978.20, 46,510,467.30 and 21,759,904.80

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Solution

The fourth proportional to 31,006,978.20, 46,510,467.30 and 21,759,904.80 is: 32,639,857.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,006,978.20 : 46,510,467.30 = 21,759,904.80 : x
  2. Step 2: Convert to fraction form
    31,006,978.20/46,510,467.30 = 21,759,904.80/x
  3. Step 3: Cross multiply
    31,006,978.20x = 46,510,467.30 × 21,759,904.80
  4. Step 4: Simplify right side
    31,006,978.20x = 1,012,063,340,651,513
  5. Step 5: Solve for x
    x = 1,012,063,340,651,513/31,006,978.20
  6. Step 6: Final answer
    x = 32,639,857.20

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