Home / 81,831.17-112,795.35-61,101.15

Finding the Fourth Proportional to 81,831.17, 112,795.35 and 61,101.15

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Solution

The fourth proportional to 81,831.17, 112,795.35 and 61,101.15 is: 84,221.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,831.17 : 112,795.35 = 61,101.15 : x
  2. Step 2: Convert to fraction form
    81,831.17/112,795.35 = 61,101.15/x
  3. Step 3: Cross multiply
    81,831.17x = 112,795.35 × 61,101.15
  4. Step 4: Simplify right side
    81,831.17x = 6,891,925,599.65
  5. Step 5: Solve for x
    x = 6,891,925,599.65/81,831.17
  6. Step 6: Final answer
    x = 84,221.28

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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.