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Finding the Fourth Proportional to 72,903.38, 100,606.66 and 39,369.38

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Solution

The fourth proportional to 72,903.38, 100,606.66 and 39,369.38 is: 54,329.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,903.38 : 100,606.66 = 39,369.38 : x
  2. Step 2: Convert to fraction form
    72,903.38/100,606.66 = 39,369.38/x
  3. Step 3: Cross multiply
    72,903.38x = 100,606.66 × 39,369.38
  4. Step 4: Simplify right side
    72,903.38x = 3,960,821,226.61
  5. Step 5: Solve for x
    x = 3,960,821,226.61/72,903.38
  6. Step 6: Final answer
    x = 54,329.74

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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.