Home / 129,166.10-178,243.64-71,805.30

Finding the Fourth Proportional to 129,166.10, 178,243.64 and 71,805.30

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Solution

The fourth proportional to 129,166.10, 178,243.64 and 71,805.30 is: 99,088.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,166.10 : 178,243.64 = 71,805.30 : x
  2. Step 2: Convert to fraction form
    129,166.10/178,243.64 = 71,805.30/x
  3. Step 3: Cross multiply
    129,166.10x = 178,243.64 × 71,805.30
  4. Step 4: Simplify right side
    129,166.10x = 12,798,838,043.29
  5. Step 5: Solve for x
    x = 12,798,838,043.29/129,166.10
  6. Step 6: Final answer
    x = 99,088.21

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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.