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Finding the Fourth Proportional to 70,479.93, 105,772.44 and 28,360.38

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Solution

The fourth proportional to 70,479.93, 105,772.44 and 28,360.38 is: 42,561.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,479.93 : 105,772.44 = 28,360.38 : x
  2. Step 2: Convert to fraction form
    70,479.93/105,772.44 = 28,360.38/x
  3. Step 3: Cross multiply
    70,479.93x = 105,772.44 × 28,360.38
  4. Step 4: Simplify right side
    70,479.93x = 2,999,746,591.93
  5. Step 5: Solve for x
    x = 2,999,746,591.93/70,479.93
  6. Step 6: Final answer
    x = 42,561.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.