Home / 129,101.22-178,220.34-86,152.17

Finding the Fourth Proportional to 129,101.22, 178,220.34 and 86,152.17

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Solution

The fourth proportional to 129,101.22, 178,220.34 and 86,152.17 is: 118,930.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,101.22 : 178,220.34 = 86,152.17 : x
  2. Step 2: Convert to fraction form
    129,101.22/178,220.34 = 86,152.17/x
  3. Step 3: Cross multiply
    129,101.22x = 178,220.34 × 86,152.17
  4. Step 4: Simplify right side
    129,101.22x = 15,354,069,029.14
  5. Step 5: Solve for x
    x = 15,354,069,029.14/129,101.22
  6. Step 6: Final answer
    x = 118,930.47

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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.