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Finding the Fourth Proportional to 66,288.76, 91,478.50 and 36,480.76

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Solution

The fourth proportional to 66,288.76, 91,478.50 and 36,480.76 is: 50,343.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,288.76 : 91,478.50 = 36,480.76 : x
  2. Step 2: Convert to fraction form
    66,288.76/91,478.50 = 36,480.76/x
  3. Step 3: Cross multiply
    66,288.76x = 91,478.50 × 36,480.76
  4. Step 4: Simplify right side
    66,288.76x = 3,337,205,203.66
  5. Step 5: Solve for x
    x = 3,337,205,203.66/66,288.76
  6. Step 6: Final answer
    x = 50,343.45

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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.