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Finding the Fourth Proportional to 129,788.76, 179,108.48 and 70,172.76

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Solution

The fourth proportional to 129,788.76, 179,108.48 and 70,172.76 is: 96,838.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,788.76 : 179,108.48 = 70,172.76 : x
  2. Step 2: Convert to fraction form
    129,788.76/179,108.48 = 70,172.76/x
  3. Step 3: Cross multiply
    129,788.76x = 179,108.48 × 70,172.76
  4. Step 4: Simplify right side
    129,788.76x = 12,568,536,381.00
  5. Step 5: Solve for x
    x = 12,568,536,381.00/129,788.76
  6. Step 6: Final answer
    x = 96,838.40

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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.