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Finding the Fourth Proportional to 52,879, 79,309.99 and 15,430.28

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Solution

The fourth proportional to 52,879, 79,309.99 and 15,430.28 is: 23,142.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,879 : 79,309.99 = 15,430.28 : x
  2. Step 2: Convert to fraction form
    52,879/79,309.99 = 15,430.28/x
  3. Step 3: Cross multiply
    52,879x = 79,309.99 × 15,430.28
  4. Step 4: Simplify right side
    52,879x = 1,223,775,352.50
  5. Step 5: Solve for x
    x = 1,223,775,352.50/52,879
  6. Step 6: Final answer
    x = 23,142.94

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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.