Home / 131,666.59-197,112.16-81,585.73

Finding the Fourth Proportional to 131,666.59, 197,112.16 and 81,585.73

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Solution

The fourth proportional to 131,666.59, 197,112.16 and 81,585.73 is: 122,138.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,666.59 : 197,112.16 = 81,585.73 : x
  2. Step 2: Convert to fraction form
    131,666.59/197,112.16 = 81,585.73/x
  3. Step 3: Cross multiply
    131,666.59x = 197,112.16 × 81,585.73
  4. Step 4: Simplify right side
    131,666.59x = 16,081,539,465.48
  5. Step 5: Solve for x
    x = 16,081,539,465.48/131,666.59
  6. Step 6: Final answer
    x = 122,138.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.