Home / 92,831.48-139,362.94-92,405

Finding the Fourth Proportional to 92,831.48, 139,362.94 and 92,405

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Solution

The fourth proportional to 92,831.48, 139,362.94 and 92,405 is: 138,722.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,831.48 : 139,362.94 = 92,405 : x
  2. Step 2: Convert to fraction form
    92,831.48/139,362.94 = 92,405/x
  3. Step 3: Cross multiply
    92,831.48x = 139,362.94 × 92,405
  4. Step 4: Simplify right side
    92,831.48x = 12,877,832,470.70
  5. Step 5: Solve for x
    x = 12,877,832,470.70/92,831.48
  6. Step 6: Final answer
    x = 138,722.69

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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.