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Finding the Fourth Proportional to 245,892.90, 368,431.70 and 85,882.86

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Solution

The fourth proportional to 245,892.90, 368,431.70 and 85,882.86 is: 128,681.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,892.90 : 368,431.70 = 85,882.86 : x
  2. Step 2: Convert to fraction form
    245,892.90/368,431.70 = 85,882.86/x
  3. Step 3: Cross multiply
    245,892.90x = 368,431.70 × 85,882.86
  4. Step 4: Simplify right side
    245,892.90x = 31,641,968,110.66
  5. Step 5: Solve for x
    x = 31,641,968,110.66/245,892.90
  6. Step 6: Final answer
    x = 128,681.91

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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.