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Finding the Fourth Proportional to 128,188.59, 176,903.82 and 70,831.62

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Solution

The fourth proportional to 128,188.59, 176,903.82 and 70,831.62 is: 97,749.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,188.59 : 176,903.82 = 70,831.62 : x
  2. Step 2: Convert to fraction form
    128,188.59/176,903.82 = 70,831.62/x
  3. Step 3: Cross multiply
    128,188.59x = 176,903.82 × 70,831.62
  4. Step 4: Simplify right side
    128,188.59x = 12,530,384,774.13
  5. Step 5: Solve for x
    x = 12,530,384,774.13/128,188.59
  6. Step 6: Final answer
    x = 97,749.61

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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.