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Finding the Fourth Proportional to 128,222.39, 176,941.45 and 70,863.86

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Solution

The fourth proportional to 128,222.39, 176,941.45 and 70,863.86 is: 97,789.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,222.39 : 176,941.45 = 70,863.86 : x
  2. Step 2: Convert to fraction form
    128,222.39/176,941.45 = 70,863.86/x
  3. Step 3: Cross multiply
    128,222.39x = 176,941.45 × 70,863.86
  4. Step 4: Simplify right side
    128,222.39x = 12,538,752,901.97
  5. Step 5: Solve for x
    x = 12,538,752,901.97/128,222.39
  6. Step 6: Final answer
    x = 97,789.11

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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.