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Finding the Fourth Proportional to 115,700.80, 173,090.40 and 104,641.60

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Solution

The fourth proportional to 115,700.80, 173,090.40 and 104,641.60 is: 156,545.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,700.80 : 173,090.40 = 104,641.60 : x
  2. Step 2: Convert to fraction form
    115,700.80/173,090.40 = 104,641.60/x
  3. Step 3: Cross multiply
    115,700.80x = 173,090.40 × 104,641.60
  4. Step 4: Simplify right side
    115,700.80x = 18,112,456,400.64
  5. Step 5: Solve for x
    x = 18,112,456,400.64/115,700.80
  6. Step 6: Final answer
    x = 156,545.65

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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.