Home / 121,206.10-181,917.15-71,223.70

Finding the Fourth Proportional to 121,206.10, 181,917.15 and 71,223.70

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Solution

The fourth proportional to 121,206.10, 181,917.15 and 71,223.70 is: 106,899.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,206.10 : 181,917.15 = 71,223.70 : x
  2. Step 2: Convert to fraction form
    121,206.10/181,917.15 = 71,223.70/x
  3. Step 3: Cross multiply
    121,206.10x = 181,917.15 × 71,223.70
  4. Step 4: Simplify right side
    121,206.10x = 12,956,812,516.46
  5. Step 5: Solve for x
    x = 12,956,812,516.46/121,206.10
  6. Step 6: Final answer
    x = 106,899.01

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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.