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Finding the Fourth Proportional to 77,999.60, 116,999.40 and 76,833.20

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Solution

The fourth proportional to 77,999.60, 116,999.40 and 76,833.20 is: 115,249.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,999.60 : 116,999.40 = 76,833.20 : x
  2. Step 2: Convert to fraction form
    77,999.60/116,999.40 = 76,833.20/x
  3. Step 3: Cross multiply
    77,999.60x = 116,999.40 × 76,833.20
  4. Step 4: Simplify right side
    77,999.60x = 8,989,438,300.08
  5. Step 5: Solve for x
    x = 8,989,438,300.08/77,999.60
  6. Step 6: Final answer
    x = 115,249.80

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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.