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Finding the Fourth Proportional to 113,431.60, 170,147.40 and 83,907.10

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Solution

The fourth proportional to 113,431.60, 170,147.40 and 83,907.10 is: 125,860.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,431.60 : 170,147.40 = 83,907.10 : x
  2. Step 2: Convert to fraction form
    113,431.60/170,147.40 = 83,907.10/x
  3. Step 3: Cross multiply
    113,431.60x = 170,147.40 × 83,907.10
  4. Step 4: Simplify right side
    113,431.60x = 14,276,574,906.54
  5. Step 5: Solve for x
    x = 14,276,574,906.54/113,431.60
  6. Step 6: Final answer
    x = 125,860.65

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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.