Home / 61,278.47-91,917.78-19,158.78

Finding the Fourth Proportional to 61,278.47, 91,917.78 and 19,158.78

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Solution

The fourth proportional to 61,278.47, 91,917.78 and 19,158.78 is: 28,738.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,278.47 : 91,917.78 = 19,158.78 : x
  2. Step 2: Convert to fraction form
    61,278.47/91,917.78 = 19,158.78/x
  3. Step 3: Cross multiply
    61,278.47x = 91,917.78 × 19,158.78
  4. Step 4: Simplify right side
    61,278.47x = 1,761,032,301.02
  5. Step 5: Solve for x
    x = 1,761,032,301.02/61,278.47
  6. Step 6: Final answer
    x = 28,738.19

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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.