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Finding the Fourth Proportional to 142,657.00, 196,872.59 and 78,994.79

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Solution

The fourth proportional to 142,657.00, 196,872.59 and 78,994.79 is: 109,016.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,657.00 : 196,872.59 = 78,994.79 : x
  2. Step 2: Convert to fraction form
    142,657.00/196,872.59 = 78,994.79/x
  3. Step 3: Cross multiply
    142,657.00x = 196,872.59 × 78,994.79
  4. Step 4: Simplify right side
    142,657.00x = 15,551,909,297.24
  5. Step 5: Solve for x
    x = 15,551,909,297.24/142,657.00
  6. Step 6: Final answer
    x = 109,016.10

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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.