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Finding the Fourth Proportional to 92,717.81, 139,083.62 and 39,403.81

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Solution

The fourth proportional to 92,717.81, 139,083.62 and 39,403.81 is: 59,108.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,717.81 : 139,083.62 = 39,403.81 : x
  2. Step 2: Convert to fraction form
    92,717.81/139,083.62 = 39,403.81/x
  3. Step 3: Cross multiply
    92,717.81x = 139,083.62 × 39,403.81
  4. Step 4: Simplify right side
    92,717.81x = 5,480,423,991.86
  5. Step 5: Solve for x
    x = 5,480,423,991.86/92,717.81
  6. Step 6: Final answer
    x = 59,108.65

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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.