Home / 81,644.31-112,681.53-49,831.70

Finding the Fourth Proportional to 81,644.31, 112,681.53 and 49,831.70

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Solution

The fourth proportional to 81,644.31, 112,681.53 and 49,831.70 is: 68,775.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,644.31 : 112,681.53 = 49,831.70 : x
  2. Step 2: Convert to fraction form
    81,644.31/112,681.53 = 49,831.70/x
  3. Step 3: Cross multiply
    81,644.31x = 112,681.53 × 49,831.70
  4. Step 4: Simplify right side
    81,644.31x = 5,615,111,635.09
  5. Step 5: Solve for x
    x = 5,615,111,635.09/81,644.31
  6. Step 6: Final answer
    x = 68,775.30

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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.