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Finding the Fourth Proportional to 99,999.76, 137,994.60 and 55,279.12

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Solution

The fourth proportional to 99,999.76, 137,994.60 and 55,279.12 is: 76,282.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,999.76 : 137,994.60 = 55,279.12 : x
  2. Step 2: Convert to fraction form
    99,999.76/137,994.60 = 55,279.12/x
  3. Step 3: Cross multiply
    99,999.76x = 137,994.60 × 55,279.12
  4. Step 4: Simplify right side
    99,999.76x = 7,628,220,052.75
  5. Step 5: Solve for x
    x = 7,628,220,052.75/99,999.76
  6. Step 6: Final answer
    x = 76,282.38

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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.