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Finding the Fourth Proportional to 352,055.40, 528,083.10 and 115,405.80

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Solution

The fourth proportional to 352,055.40, 528,083.10 and 115,405.80 is: 173,108.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,055.40 : 528,083.10 = 115,405.80 : x
  2. Step 2: Convert to fraction form
    352,055.40/528,083.10 = 115,405.80/x
  3. Step 3: Cross multiply
    352,055.40x = 528,083.10 × 115,405.80
  4. Step 4: Simplify right side
    352,055.40x = 60,943,852,621.98
  5. Step 5: Solve for x
    x = 60,943,852,621.98/352,055.40
  6. Step 6: Final answer
    x = 173,108.70

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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.