Home / 120,428.16-166,166.91-72,684.12

Finding the Fourth Proportional to 120,428.16, 166,166.91 and 72,684.12

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Solution

The fourth proportional to 120,428.16, 166,166.91 and 72,684.12 is: 100,289.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,428.16 : 166,166.91 = 72,684.12 : x
  2. Step 2: Convert to fraction form
    120,428.16/166,166.91 = 72,684.12/x
  3. Step 3: Cross multiply
    120,428.16x = 166,166.91 × 72,684.12
  4. Step 4: Simplify right side
    120,428.16x = 12,077,695,626.47
  5. Step 5: Solve for x
    x = 12,077,695,626.47/120,428.16
  6. Step 6: Final answer
    x = 100,289.63

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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.