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Finding the Fourth Proportional to 155,999.69, 215,278.76 and 84,379.52

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Solution

The fourth proportional to 155,999.69, 215,278.76 and 84,379.52 is: 116,443.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,999.69 : 215,278.76 = 84,379.52 : x
  2. Step 2: Convert to fraction form
    155,999.69/215,278.76 = 84,379.52/x
  3. Step 3: Cross multiply
    155,999.69x = 215,278.76 × 84,379.52
  4. Step 4: Simplify right side
    155,999.69x = 18,165,116,936.70
  5. Step 5: Solve for x
    x = 18,165,116,936.70/155,999.69
  6. Step 6: Final answer
    x = 116,443.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.