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Finding the Fourth Proportional to 66,378.56, 91,601.70 and 38,088.68

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Solution

The fourth proportional to 66,378.56, 91,601.70 and 38,088.68 is: 52,561.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,378.56 : 91,601.70 = 38,088.68 : x
  2. Step 2: Convert to fraction form
    66,378.56/91,601.70 = 38,088.68/x
  3. Step 3: Cross multiply
    66,378.56x = 91,601.70 × 38,088.68
  4. Step 4: Simplify right side
    66,378.56x = 3,488,987,838.76
  5. Step 5: Solve for x
    x = 3,488,987,838.76/66,378.56
  6. Step 6: Final answer
    x = 52,561.97

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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.