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Finding the Fourth Proportional to 70,287.55, 105,320.60 and 38,650.62

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Solution

The fourth proportional to 70,287.55, 105,320.60 and 38,650.62 is: 57,915.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,287.55 : 105,320.60 = 38,650.62 : x
  2. Step 2: Convert to fraction form
    70,287.55/105,320.60 = 38,650.62/x
  3. Step 3: Cross multiply
    70,287.55x = 105,320.60 × 38,650.62
  4. Step 4: Simplify right side
    70,287.55x = 4,070,706,460.39
  5. Step 5: Solve for x
    x = 4,070,706,460.39/70,287.55
  6. Step 6: Final answer
    x = 57,915.04

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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.