Home / 131,412.10-197,118.15-81,807.70

Finding the Fourth Proportional to 131,412.10, 197,118.15 and 81,807.70

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Solution

The fourth proportional to 131,412.10, 197,118.15 and 81,807.70 is: 122,711.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,412.10 : 197,118.15 = 81,807.70 : x
  2. Step 2: Convert to fraction form
    131,412.10/197,118.15 = 81,807.70/x
  3. Step 3: Cross multiply
    131,412.10x = 197,118.15 × 81,807.70
  4. Step 4: Simplify right side
    131,412.10x = 16,125,782,479.76
  5. Step 5: Solve for x
    x = 16,125,782,479.76/131,412.10
  6. Step 6: Final answer
    x = 122,711.55

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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.