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Finding the Fourth Proportional to 113,390.69, 170,141.36 and 71,290.56

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Solution

The fourth proportional to 113,390.69, 170,141.36 and 71,290.56 is: 106,970.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,390.69 : 170,141.36 = 71,290.56 : x
  2. Step 2: Convert to fraction form
    113,390.69/170,141.36 = 71,290.56/x
  3. Step 3: Cross multiply
    113,390.69x = 170,141.36 × 71,290.56
  4. Step 4: Simplify right side
    113,390.69x = 12,129,472,477.11
  5. Step 5: Solve for x
    x = 12,129,472,477.11/113,390.69
  6. Step 6: Final answer
    x = 106,970.63

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1.5x scale

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.