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Finding the Fourth Proportional to 120,059.65, 179,964.33 and 45,128.17

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Solution

The fourth proportional to 120,059.65, 179,964.33 and 45,128.17 is: 67,645.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,059.65 : 179,964.33 = 45,128.17 : x
  2. Step 2: Convert to fraction form
    120,059.65/179,964.33 = 45,128.17/x
  3. Step 3: Cross multiply
    120,059.65x = 179,964.33 × 45,128.17
  4. Step 4: Simplify right side
    120,059.65x = 8,121,460,878.18
  5. Step 5: Solve for x
    x = 8,121,460,878.18/120,059.65
  6. Step 6: Final answer
    x = 67,645.22

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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.