Home / 131,488.70-197,233.05-81,406.40

Finding the Fourth Proportional to 131,488.70, 197,233.05 and 81,406.40

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Solution

The fourth proportional to 131,488.70, 197,233.05 and 81,406.40 is: 122,109.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,488.70 : 197,233.05 = 81,406.40 : x
  2. Step 2: Convert to fraction form
    131,488.70/197,233.05 = 81,406.40/x
  3. Step 3: Cross multiply
    131,488.70x = 197,233.05 × 81,406.40
  4. Step 4: Simplify right side
    131,488.70x = 16,056,032,561.52
  5. Step 5: Solve for x
    x = 16,056,032,561.52/131,488.70
  6. Step 6: Final answer
    x = 122,109.60

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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.