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Finding the Fourth Proportional to 113,562, 170,213.81 and 69,090.71

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Solution

The fourth proportional to 113,562, 170,213.81 and 69,090.71 is: 103,557.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,562 : 170,213.81 = 69,090.71 : x
  2. Step 2: Convert to fraction form
    113,562/170,213.81 = 69,090.71/x
  3. Step 3: Cross multiply
    113,562x = 170,213.81 × 69,090.71
  4. Step 4: Simplify right side
    113,562x = 11,760,191,788.18
  5. Step 5: Solve for x
    x = 11,760,191,788.18/113,562
  6. Step 6: Final answer
    x = 103,557.46

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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.