Home / 127,639.56-176,162.40-76,680.66

Finding the Fourth Proportional to 127,639.56, 176,162.40 and 76,680.66

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Solution

The fourth proportional to 127,639.56, 176,162.40 and 76,680.66 is: 105,831.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,639.56 : 176,162.40 = 76,680.66 : x
  2. Step 2: Convert to fraction form
    127,639.56/176,162.40 = 76,680.66/x
  3. Step 3: Cross multiply
    127,639.56x = 176,162.40 × 76,680.66
  4. Step 4: Simplify right side
    127,639.56x = 13,508,249,099.18
  5. Step 5: Solve for x
    x = 13,508,249,099.18/127,639.56
  6. Step 6: Final answer
    x = 105,831.21

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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.