Home / 120,222.81-165,908.10-66,509.71

Finding the Fourth Proportional to 120,222.81, 165,908.10 and 66,509.71

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Solution

The fourth proportional to 120,222.81, 165,908.10 and 66,509.71 is: 91,783.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,222.81 : 165,908.10 = 66,509.71 : x
  2. Step 2: Convert to fraction form
    120,222.81/165,908.10 = 66,509.71/x
  3. Step 3: Cross multiply
    120,222.81x = 165,908.10 × 66,509.71
  4. Step 4: Simplify right side
    120,222.81x = 11,034,499,078.18
  5. Step 5: Solve for x
    x = 11,034,499,078.18/120,222.81
  6. Step 6: Final answer
    x = 91,783.74

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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.