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Finding the Fourth Proportional to 352,065.40, 528,098.10 and 115,415.80

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Solution

The fourth proportional to 352,065.40, 528,098.10 and 115,415.80 is: 173,123.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,065.40 : 528,098.10 = 115,415.80 : x
  2. Step 2: Convert to fraction form
    352,065.40/528,098.10 = 115,415.80/x
  3. Step 3: Cross multiply
    352,065.40x = 528,098.10 × 115,415.80
  4. Step 4: Simplify right side
    352,065.40x = 60,950,864,689.98
  5. Step 5: Solve for x
    x = 60,950,864,689.98/352,065.40
  6. Step 6: Final answer
    x = 173,123.70

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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.