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Finding the Fourth Proportional to 81,831.90, 112,914.90 and 46,021.80

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Solution

The fourth proportional to 81,831.90, 112,914.90 and 46,021.80 is: 63,502.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,831.90 : 112,914.90 = 46,021.80 : x
  2. Step 2: Convert to fraction form
    81,831.90/112,914.90 = 46,021.80/x
  3. Step 3: Cross multiply
    81,831.90x = 112,914.90 × 46,021.80
  4. Step 4: Simplify right side
    81,831.90x = 5,196,546,944.82
  5. Step 5: Solve for x
    x = 5,196,546,944.82/81,831.90
  6. Step 6: Final answer
    x = 63,502.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.