Home / 129,627.24-178,900.02-81,878.28

Finding the Fourth Proportional to 129,627.24, 178,900.02 and 81,878.28

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Solution

The fourth proportional to 129,627.24, 178,900.02 and 81,878.28 is: 113,001.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,627.24 : 178,900.02 = 81,878.28 : x
  2. Step 2: Convert to fraction form
    129,627.24/178,900.02 = 81,878.28/x
  3. Step 3: Cross multiply
    129,627.24x = 178,900.02 × 81,878.28
  4. Step 4: Simplify right side
    129,627.24x = 14,648,025,929.57
  5. Step 5: Solve for x
    x = 14,648,025,929.57/129,627.24
  6. Step 6: Final answer
    x = 113,001.14

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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.