Home / 129,155.77-178,228.11-72,563.50

Finding the Fourth Proportional to 129,155.77, 178,228.11 and 72,563.50

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Solution

The fourth proportional to 129,155.77, 178,228.11 and 72,563.50 is: 100,133.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,155.77 : 178,228.11 = 72,563.50 : x
  2. Step 2: Convert to fraction form
    129,155.77/178,228.11 = 72,563.50/x
  3. Step 3: Cross multiply
    129,155.77x = 178,228.11 × 72,563.50
  4. Step 4: Simplify right side
    129,155.77x = 12,932,855,459.99
  5. Step 5: Solve for x
    x = 12,932,855,459.99/129,155.77
  6. Step 6: Final answer
    x = 100,133.78

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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.