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Finding the Fourth Proportional to 69,718.64, 96,211.45 and 39,509.71

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Solution

The fourth proportional to 69,718.64, 96,211.45 and 39,509.71 is: 54,523.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,718.64 : 96,211.45 = 39,509.71 : x
  2. Step 2: Convert to fraction form
    69,718.64/96,211.45 = 39,509.71/x
  3. Step 3: Cross multiply
    69,718.64x = 96,211.45 × 39,509.71
  4. Step 4: Simplify right side
    69,718.64x = 3,801,286,488.18
  5. Step 5: Solve for x
    x = 3,801,286,488.18/69,718.64
  6. Step 6: Final answer
    x = 54,523.24

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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.