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Finding the Fourth Proportional to 143,978.06, 215,952.48 and 38,807.66

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Solution

The fourth proportional to 143,978.06, 215,952.48 and 38,807.66 is: 58,207.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,978.06 : 215,952.48 = 38,807.66 : x
  2. Step 2: Convert to fraction form
    143,978.06/215,952.48 = 38,807.66/x
  3. Step 3: Cross multiply
    143,978.06x = 215,952.48 × 38,807.66
  4. Step 4: Simplify right side
    143,978.06x = 8,380,610,420.00
  5. Step 5: Solve for x
    x = 8,380,610,420.00/143,978.06
  6. Step 6: Final answer
    x = 58,207.55

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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.