Home / 129,163.11-178,239.51-71,802.30

Finding the Fourth Proportional to 129,163.11, 178,239.51 and 71,802.30

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Solution

The fourth proportional to 129,163.11, 178,239.51 and 71,802.30 is: 99,084.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,163.11 : 178,239.51 = 71,802.30 : x
  2. Step 2: Convert to fraction form
    129,163.11/178,239.51 = 71,802.30/x
  3. Step 3: Cross multiply
    129,163.11x = 178,239.51 × 71,802.30
  4. Step 4: Simplify right side
    129,163.11x = 12,798,006,768.87
  5. Step 5: Solve for x
    x = 12,798,006,768.87/129,163.11
  6. Step 6: Final answer
    x = 99,084.07

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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.