Home / 142,783.20-197,042.40-79,122.24

Finding the Fourth Proportional to 142,783.20, 197,042.40 and 79,122.24

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Solution

The fourth proportional to 142,783.20, 197,042.40 and 79,122.24 is: 109,189.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,783.20 : 197,042.40 = 79,122.24 : x
  2. Step 2: Convert to fraction form
    142,783.20/197,042.40 = 79,122.24/x
  3. Step 3: Cross multiply
    142,783.20x = 197,042.40 × 79,122.24
  4. Step 4: Simplify right side
    142,783.20x = 15,590,436,062.98
  5. Step 5: Solve for x
    x = 15,590,436,062.98/142,783.20
  6. Step 6: Final answer
    x = 109,189.57

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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.