Home / 76,680.45-105,759.02-49,831.53

Finding the Fourth Proportional to 76,680.45, 105,759.02 and 49,831.53

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Solution

The fourth proportional to 76,680.45, 105,759.02 and 49,831.53 is: 68,728.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,680.45 : 105,759.02 = 49,831.53 : x
  2. Step 2: Convert to fraction form
    76,680.45/105,759.02 = 49,831.53/x
  3. Step 3: Cross multiply
    76,680.45x = 105,759.02 × 49,831.53
  4. Step 4: Simplify right side
    76,680.45x = 5,270,133,528.74
  5. Step 5: Solve for x
    x = 5,270,133,528.74/76,680.45
  6. Step 6: Final answer
    x = 68,728.52

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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.