Home / 129,312.28-178,449.78-72,722.44

Finding the Fourth Proportional to 129,312.28, 178,449.78 and 72,722.44

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Solution

The fourth proportional to 129,312.28, 178,449.78 and 72,722.44 is: 100,356.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,312.28 : 178,449.78 = 72,722.44 : x
  2. Step 2: Convert to fraction form
    129,312.28/178,449.78 = 72,722.44/x
  3. Step 3: Cross multiply
    129,312.28x = 178,449.78 × 72,722.44
  4. Step 4: Simplify right side
    129,312.28x = 12,977,303,419.06
  5. Step 5: Solve for x
    x = 12,977,303,419.06/129,312.28
  6. Step 6: Final answer
    x = 100,356.31

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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.