Home / 108,639.93-149,975.55-72,401.70

Finding the Fourth Proportional to 108,639.93, 149,975.55 and 72,401.70

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Solution

The fourth proportional to 108,639.93, 149,975.55 and 72,401.70 is: 99,949.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,639.93 : 149,975.55 = 72,401.70 : x
  2. Step 2: Convert to fraction form
    108,639.93/149,975.55 = 72,401.70/x
  3. Step 3: Cross multiply
    108,639.93x = 149,975.55 × 72,401.70
  4. Step 4: Simplify right side
    108,639.93x = 10,858,484,778.44
  5. Step 5: Solve for x
    x = 10,858,484,778.44/108,639.93
  6. Step 6: Final answer
    x = 99,949.30

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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.