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Finding the Fourth Proportional to 101,870.13, 140,573.94 and 61,606.09

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Solution

The fourth proportional to 101,870.13, 140,573.94 and 61,606.09 is: 85,012.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,870.13 : 140,573.94 = 61,606.09 : x
  2. Step 2: Convert to fraction form
    101,870.13/140,573.94 = 61,606.09/x
  3. Step 3: Cross multiply
    101,870.13x = 140,573.94 × 61,606.09
  4. Step 4: Simplify right side
    101,870.13x = 8,660,210,799.29
  5. Step 5: Solve for x
    x = 8,660,210,799.29/101,870.13
  6. Step 6: Final answer
    x = 85,012.27

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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.