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Finding the Fourth Proportional to 142,755.92, 196,994.94 and 79,089.92

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Solution

The fourth proportional to 142,755.92, 196,994.94 and 79,089.92 is: 109,139.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,755.92 : 196,994.94 = 79,089.92 : x
  2. Step 2: Convert to fraction form
    142,755.92/196,994.94 = 79,089.92/x
  3. Step 3: Cross multiply
    142,755.92x = 196,994.94 × 79,089.92
  4. Step 4: Simplify right side
    142,755.92x = 15,580,314,045.00
  5. Step 5: Solve for x
    x = 15,580,314,045.00/142,755.92
  6. Step 6: Final answer
    x = 109,139.53

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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.