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Finding the Fourth Proportional to 60,991.65, 91,453.77 and 18,860.13

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Solution

The fourth proportional to 60,991.65, 91,453.77 and 18,860.13 is: 28,279.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,991.65 : 91,453.77 = 18,860.13 : x
  2. Step 2: Convert to fraction form
    60,991.65/91,453.77 = 18,860.13/x
  3. Step 3: Cross multiply
    60,991.65x = 91,453.77 × 18,860.13
  4. Step 4: Simplify right side
    60,991.65x = 1,724,829,991.19
  5. Step 5: Solve for x
    x = 1,724,829,991.19/60,991.65
  6. Step 6: Final answer
    x = 28,279.77

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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.