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Finding the Fourth Proportional to 123,358.70, 170,239.11 and 75,602.81

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Solution

The fourth proportional to 123,358.70, 170,239.11 and 75,602.81 is: 104,334.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,358.70 : 170,239.11 = 75,602.81 : x
  2. Step 2: Convert to fraction form
    123,358.70/170,239.11 = 75,602.81/x
  3. Step 3: Cross multiply
    123,358.70x = 170,239.11 × 75,602.81
  4. Step 4: Simplify right side
    123,358.70x = 12,870,555,087.90
  5. Step 5: Solve for x
    x = 12,870,555,087.90/123,358.70
  6. Step 6: Final answer
    x = 104,334.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.