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Finding the Fourth Proportional to 91,887.40, 137,831.10 and 84,514.60

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Solution

The fourth proportional to 91,887.40, 137,831.10 and 84,514.60 is: 126,771.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,887.40 : 137,831.10 = 84,514.60 : x
  2. Step 2: Convert to fraction form
    91,887.40/137,831.10 = 84,514.60/x
  3. Step 3: Cross multiply
    91,887.40x = 137,831.10 × 84,514.60
  4. Step 4: Simplify right side
    91,887.40x = 11,648,740,284.06
  5. Step 5: Solve for x
    x = 11,648,740,284.06/91,887.40
  6. Step 6: Final answer
    x = 126,771.90

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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.