Home / 142,783.94-197,036.88-79,127.66

Finding the Fourth Proportional to 142,783.94, 197,036.88 and 79,127.66

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Solution

The fourth proportional to 142,783.94, 197,036.88 and 79,127.66 is: 109,193.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,783.94 : 197,036.88 = 79,127.66 : x
  2. Step 2: Convert to fraction form
    142,783.94/197,036.88 = 79,127.66/x
  3. Step 3: Cross multiply
    142,783.94x = 197,036.88 × 79,127.66
  4. Step 4: Simplify right side
    142,783.94x = 15,591,067,248.10
  5. Step 5: Solve for x
    x = 15,591,067,248.10/142,783.94
  6. Step 6: Final answer
    x = 109,193.42

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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.