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Finding the Fourth Proportional to 129,955.57, 179,349.11 and 103,317.91

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Solution

The fourth proportional to 129,955.57, 179,349.11 and 103,317.91 is: 142,587.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,955.57 : 179,349.11 = 103,317.91 : x
  2. Step 2: Convert to fraction form
    129,955.57/179,349.11 = 103,317.91/x
  3. Step 3: Cross multiply
    129,955.57x = 179,349.11 × 103,317.91
  4. Step 4: Simplify right side
    129,955.57x = 18,529,975,205.56
  5. Step 5: Solve for x
    x = 18,529,975,205.56/129,955.57
  6. Step 6: Final answer
    x = 142,587.00

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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.