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Finding the Fourth Proportional to 61,279.94, 91,919.99 and 19,160.25

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Solution

The fourth proportional to 61,279.94, 91,919.99 and 19,160.25 is: 28,740.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,279.94 : 91,919.99 = 19,160.25 : x
  2. Step 2: Convert to fraction form
    61,279.94/91,919.99 = 19,160.25/x
  3. Step 3: Cross multiply
    61,279.94x = 91,919.99 × 19,160.25
  4. Step 4: Simplify right side
    61,279.94x = 1,761,209,988.40
  5. Step 5: Solve for x
    x = 1,761,209,988.40/61,279.94
  6. Step 6: Final answer
    x = 28,740.40

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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.