Home / 129,163.61-178,240.20-71,802.80

Finding the Fourth Proportional to 129,163.61, 178,240.20 and 71,802.80

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Solution

The fourth proportional to 129,163.61, 178,240.20 and 71,802.80 is: 99,084.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,163.61 : 178,240.20 = 71,802.80 : x
  2. Step 2: Convert to fraction form
    129,163.61/178,240.20 = 71,802.80/x
  3. Step 3: Cross multiply
    129,163.61x = 178,240.20 × 71,802.80
  4. Step 4: Simplify right side
    129,163.61x = 12,798,144,541.36
  5. Step 5: Solve for x
    x = 12,798,144,541.36/129,163.61
  6. Step 6: Final answer
    x = 99,084.76

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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.