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Finding the Fourth Proportional to 285,775.61, 428,664.87 and 72,543.60

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Solution

The fourth proportional to 285,775.61, 428,664.87 and 72,543.60 is: 108,815.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,775.61 : 428,664.87 = 72,543.60 : x
  2. Step 2: Convert to fraction form
    285,775.61/428,664.87 = 72,543.60/x
  3. Step 3: Cross multiply
    285,775.61x = 428,664.87 × 72,543.60
  4. Step 4: Simplify right side
    285,775.61x = 31,096,892,863.33
  5. Step 5: Solve for x
    x = 31,096,892,863.33/285,775.61
  6. Step 6: Final answer
    x = 108,815.77

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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.