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Finding the Fourth Proportional to 77,999.72, 116,987.16 and 21,833.78

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Solution

The fourth proportional to 77,999.72, 116,987.16 and 21,833.78 is: 32,747.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,999.72 : 116,987.16 = 21,833.78 : x
  2. Step 2: Convert to fraction form
    77,999.72/116,987.16 = 21,833.78/x
  3. Step 3: Cross multiply
    77,999.72x = 116,987.16 × 21,833.78
  4. Step 4: Simplify right side
    77,999.72x = 2,554,271,914.26
  5. Step 5: Solve for x
    x = 2,554,271,914.26/77,999.72
  6. Step 6: Final answer
    x = 32,747.19

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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.