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Finding the Fourth Proportional to 72,698.50, 100,325.55 and 44,419.78

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Solution

The fourth proportional to 72,698.50, 100,325.55 and 44,419.78 is: 61,300.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,698.50 : 100,325.55 = 44,419.78 : x
  2. Step 2: Convert to fraction form
    72,698.50/100,325.55 = 44,419.78/x
  3. Step 3: Cross multiply
    72,698.50x = 100,325.55 × 44,419.78
  4. Step 4: Simplify right side
    72,698.50x = 4,456,438,859.38
  5. Step 5: Solve for x
    x = 4,456,438,859.38/72,698.50
  6. Step 6: Final answer
    x = 61,300.29

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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.