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Finding the Fourth Proportional to 129,803.66, 179,129.31 and 70,187.66

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Solution

The fourth proportional to 129,803.66, 179,129.31 and 70,187.66 is: 96,859.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,803.66 : 179,129.31 = 70,187.66 : x
  2. Step 2: Convert to fraction form
    129,803.66/179,129.31 = 70,187.66/x
  3. Step 3: Cross multiply
    129,803.66x = 179,129.31 × 70,187.66
  4. Step 4: Simplify right side
    129,803.66x = 12,572,667,106.31
  5. Step 5: Solve for x
    x = 12,572,667,106.31/129,803.66
  6. Step 6: Final answer
    x = 96,859.11

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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.