Home / 129,334.12-178,466.64-72,744.28

Finding the Fourth Proportional to 129,334.12, 178,466.64 and 72,744.28

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Solution

The fourth proportional to 129,334.12, 178,466.64 and 72,744.28 is: 100,378.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,334.12 : 178,466.64 = 72,744.28 : x
  2. Step 2: Convert to fraction form
    129,334.12/178,466.64 = 72,744.28/x
  3. Step 3: Cross multiply
    129,334.12x = 178,466.64 × 72,744.28
  4. Step 4: Simplify right side
    129,334.12x = 12,982,427,230.82
  5. Step 5: Solve for x
    x = 12,982,427,230.82/129,334.12
  6. Step 6: Final answer
    x = 100,378.98

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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.