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Finding the Fourth Proportional to 129,767.50, 179,079.15 and 70,151.50

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Solution

The fourth proportional to 129,767.50, 179,079.15 and 70,151.50 is: 96,809.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,767.50 : 179,079.15 = 70,151.50 : x
  2. Step 2: Convert to fraction form
    129,767.50/179,079.15 = 70,151.50/x
  3. Step 3: Cross multiply
    129,767.50x = 179,079.15 × 70,151.50
  4. Step 4: Simplify right side
    129,767.50x = 12,562,670,991.23
  5. Step 5: Solve for x
    x = 12,562,670,991.23/129,767.50
  6. Step 6: Final answer
    x = 96,809.07

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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.