Home / 121,469.64-167,554.60-78,381.69

Finding the Fourth Proportional to 121,469.64, 167,554.60 and 78,381.69

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Solution

The fourth proportional to 121,469.64, 167,554.60 and 78,381.69 is: 108,119.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,469.64 : 167,554.60 = 78,381.69 : x
  2. Step 2: Convert to fraction form
    121,469.64/167,554.60 = 78,381.69/x
  3. Step 3: Cross multiply
    121,469.64x = 167,554.60 × 78,381.69
  4. Step 4: Simplify right side
    121,469.64x = 13,133,212,715.27
  5. Step 5: Solve for x
    x = 13,133,212,715.27/121,469.64
  6. Step 6: Final answer
    x = 108,119.30

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1.5x scale

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.