Home / 142,783.85-197,042.88-79,122.71

Finding the Fourth Proportional to 142,783.85, 197,042.88 and 79,122.71

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Solution

The fourth proportional to 142,783.85, 197,042.88 and 79,122.71 is: 109,189.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,783.85 : 197,042.88 = 79,122.71 : x
  2. Step 2: Convert to fraction form
    142,783.85/197,042.88 = 79,122.71/x
  3. Step 3: Cross multiply
    142,783.85x = 197,042.88 × 79,122.71
  4. Step 4: Simplify right side
    142,783.85x = 15,590,565,666.59
  5. Step 5: Solve for x
    x = 15,590,565,666.59/142,783.85
  6. Step 6: Final answer
    x = 109,189.98

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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.