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Finding the Fourth Proportional to 82,025.70, 123,038.55 and 68,903.70

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Solution

The fourth proportional to 82,025.70, 123,038.55 and 68,903.70 is: 103,355.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,025.70 : 123,038.55 = 68,903.70 : x
  2. Step 2: Convert to fraction form
    82,025.70/123,038.55 = 68,903.70/x
  3. Step 3: Cross multiply
    82,025.70x = 123,038.55 × 68,903.70
  4. Step 4: Simplify right side
    82,025.70x = 8,477,811,337.64
  5. Step 5: Solve for x
    x = 8,477,811,337.64/82,025.70
  6. Step 6: Final answer
    x = 103,355.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.