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Finding the Fourth Proportional to 257,887.12, 386,835.46 and 89,412.94

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Solution

The fourth proportional to 257,887.12, 386,835.46 and 89,412.94 is: 134,121.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,887.12 : 386,835.46 = 89,412.94 : x
  2. Step 2: Convert to fraction form
    257,887.12/386,835.46 = 89,412.94/x
  3. Step 3: Cross multiply
    257,887.12x = 386,835.46 × 89,412.94
  4. Step 4: Simplify right side
    257,887.12x = 34,588,093,393.61
  5. Step 5: Solve for x
    x = 34,588,093,393.61/257,887.12
  6. Step 6: Final answer
    x = 134,121.06

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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.