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Finding the Fourth Proportional to 129,809.76, 179,137.48 and 70,193.76

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Solution

The fourth proportional to 129,809.76, 179,137.48 and 70,193.76 is: 96,867.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,809.76 : 179,137.48 = 70,193.76 : x
  2. Step 2: Convert to fraction form
    129,809.76/179,137.48 = 70,193.76/x
  3. Step 3: Cross multiply
    129,809.76x = 179,137.48 × 70,193.76
  4. Step 4: Simplify right side
    129,809.76x = 12,574,333,278.12
  5. Step 5: Solve for x
    x = 12,574,333,278.12/129,809.76
  6. Step 6: Final answer
    x = 96,867.39

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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.