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Finding the Fourth Proportional to 46,561.40, 69,860.80 and 21,272.90

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Solution

The fourth proportional to 46,561.40, 69,860.80 and 21,272.90 is: 31,917.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    46,561.40 : 69,860.80 = 21,272.90 : x
  2. Step 2: Convert to fraction form
    46,561.40/69,860.80 = 21,272.90/x
  3. Step 3: Cross multiply
    46,561.40x = 69,860.80 × 21,272.90
  4. Step 4: Simplify right side
    46,561.40x = 1,486,141,812.32
  5. Step 5: Solve for x
    x = 1,486,141,812.32/46,561.40
  6. Step 6: Final answer
    x = 31,917.89

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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.