Home / 129,297.78-178,427.49-71,934.20

Finding the Fourth Proportional to 129,297.78, 178,427.49 and 71,934.20

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Solution

The fourth proportional to 129,297.78, 178,427.49 and 71,934.20 is: 99,267.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,297.78 : 178,427.49 = 71,934.20 : x
  2. Step 2: Convert to fraction form
    129,297.78/178,427.49 = 71,934.20/x
  3. Step 3: Cross multiply
    129,297.78x = 178,427.49 × 71,934.20
  4. Step 4: Simplify right side
    129,297.78x = 12,835,038,751.16
  5. Step 5: Solve for x
    x = 12,835,038,751.16/129,297.78
  6. Step 6: Final answer
    x = 99,267.28

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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.