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Finding the Fourth Proportional to 128,037.55, 176,691.81 and 70,676.86

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Solution

The fourth proportional to 128,037.55, 176,691.81 and 70,676.86 is: 97,534.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,037.55 : 176,691.81 = 70,676.86 : x
  2. Step 2: Convert to fraction form
    128,037.55/176,691.81 = 70,676.86/x
  3. Step 3: Cross multiply
    128,037.55x = 176,691.81 × 70,676.86
  4. Step 4: Simplify right side
    128,037.55x = 12,488,022,318.52
  5. Step 5: Solve for x
    x = 12,488,022,318.52/128,037.55
  6. Step 6: Final answer
    x = 97,534.06

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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.