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Finding the Fourth Proportional to 352,079.40, 528,119.10 and 115,429.80

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Solution

The fourth proportional to 352,079.40, 528,119.10 and 115,429.80 is: 173,144.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,079.40 : 528,119.10 = 115,429.80 : x
  2. Step 2: Convert to fraction form
    352,079.40/528,119.10 = 115,429.80/x
  3. Step 3: Cross multiply
    352,079.40x = 528,119.10 × 115,429.80
  4. Step 4: Simplify right side
    352,079.40x = 60,960,682,089.18
  5. Step 5: Solve for x
    x = 60,960,682,089.18/352,079.40
  6. Step 6: Final answer
    x = 173,144.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.