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Finding the Fourth Proportional to 121,485.72, 167,593.14 and 79,028.76

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Solution

The fourth proportional to 121,485.72, 167,593.14 and 79,028.76 is: 109,022.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,485.72 : 167,593.14 = 79,028.76 : x
  2. Step 2: Convert to fraction form
    121,485.72/167,593.14 = 79,028.76/x
  3. Step 3: Cross multiply
    121,485.72x = 167,593.14 × 79,028.76
  4. Step 4: Simplify right side
    121,485.72x = 13,244,678,038.71
  5. Step 5: Solve for x
    x = 13,244,678,038.71/121,485.72
  6. Step 6: Final answer
    x = 109,022.51

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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.