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Finding the Fourth Proportional to 129,742, 179,043.98 and 70,126

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Solution

The fourth proportional to 129,742, 179,043.98 and 70,126 is: 96,773.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,742 : 179,043.98 = 70,126 : x
  2. Step 2: Convert to fraction form
    129,742/179,043.98 = 70,126/x
  3. Step 3: Cross multiply
    129,742x = 179,043.98 × 70,126
  4. Step 4: Simplify right side
    129,742x = 12,555,638,141.48
  5. Step 5: Solve for x
    x = 12,555,638,141.48/129,742
  6. Step 6: Final answer
    x = 96,773.89

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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.