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Finding the Fourth Proportional to 77,999.72, 116,999.49 and 25,409.12

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Solution

The fourth proportional to 77,999.72, 116,999.49 and 25,409.12 is: 38,113.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,999.72 : 116,999.49 = 25,409.12 : x
  2. Step 2: Convert to fraction form
    77,999.72/116,999.49 = 25,409.12/x
  3. Step 3: Cross multiply
    77,999.72x = 116,999.49 × 25,409.12
  4. Step 4: Simplify right side
    77,999.72x = 2,972,854,081.35
  5. Step 5: Solve for x
    x = 2,972,854,081.35/77,999.72
  6. Step 6: Final answer
    x = 38,113.65

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1.5x scale

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.