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Finding the Fourth Proportional to 130,358.34, 179,831.88 and 76,640.76

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Solution

The fourth proportional to 130,358.34, 179,831.88 and 76,640.76 is: 105,727.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,358.34 : 179,831.88 = 76,640.76 : x
  2. Step 2: Convert to fraction form
    130,358.34/179,831.88 = 76,640.76/x
  3. Step 3: Cross multiply
    130,358.34x = 179,831.88 × 76,640.76
  4. Step 4: Simplify right side
    130,358.34x = 13,782,451,955.43
  5. Step 5: Solve for x
    x = 13,782,451,955.43/130,358.34
  6. Step 6: Final answer
    x = 105,727.43

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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.