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Finding the Fourth Proportional to 258,411.18, 387,586.01 and 68,885.76

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Solution

The fourth proportional to 258,411.18, 387,586.01 and 68,885.76 is: 103,320.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,411.18 : 387,586.01 = 68,885.76 : x
  2. Step 2: Convert to fraction form
    258,411.18/387,586.01 = 68,885.76/x
  3. Step 3: Cross multiply
    258,411.18x = 387,586.01 × 68,885.76
  4. Step 4: Simplify right side
    258,411.18x = 26,699,156,519.79
  5. Step 5: Solve for x
    x = 26,699,156,519.79/258,411.18
  6. Step 6: Final answer
    x = 103,320.44

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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.