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Finding the Fourth Proportional to 128,242.26, 176,974.11 and 70,885.98

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Solution

The fourth proportional to 128,242.26, 176,974.11 and 70,885.98 is: 97,822.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,242.26 : 176,974.11 = 70,885.98 : x
  2. Step 2: Convert to fraction form
    128,242.26/176,974.11 = 70,885.98/x
  3. Step 3: Cross multiply
    128,242.26x = 176,974.11 × 70,885.98
  4. Step 4: Simplify right side
    128,242.26x = 12,544,983,221.98
  5. Step 5: Solve for x
    x = 12,544,983,221.98/128,242.26
  6. Step 6: Final answer
    x = 97,822.54

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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.