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Finding the Fourth Proportional to 61,139.04, 91,696.89 and 19,019.64

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Solution

The fourth proportional to 61,139.04, 91,696.89 and 19,019.64 is: 28,525.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,139.04 : 91,696.89 = 19,019.64 : x
  2. Step 2: Convert to fraction form
    61,139.04/91,696.89 = 19,019.64/x
  3. Step 3: Cross multiply
    61,139.04x = 91,696.89 × 19,019.64
  4. Step 4: Simplify right side
    61,139.04x = 1,744,041,788.61
  5. Step 5: Solve for x
    x = 1,744,041,788.61/61,139.04
  6. Step 6: Final answer
    x = 28,525.83

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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.