Home / 81,774.05-112,831.64-47,775.97

Finding the Fourth Proportional to 81,774.05, 112,831.64 and 47,775.97

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Solution

The fourth proportional to 81,774.05, 112,831.64 and 47,775.97 is: 65,921.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,774.05 : 112,831.64 = 47,775.97 : x
  2. Step 2: Convert to fraction form
    81,774.05/112,831.64 = 47,775.97/x
  3. Step 3: Cross multiply
    81,774.05x = 112,831.64 × 47,775.97
  4. Step 4: Simplify right side
    81,774.05x = 5,390,641,131.51
  5. Step 5: Solve for x
    x = 5,390,641,131.51/81,774.05
  6. Step 6: Final answer
    x = 65,921.17

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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.