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Finding the Fourth Proportional to 59,149.81, 88,742.94 and 20,685.21

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Solution

The fourth proportional to 59,149.81, 88,742.94 and 20,685.21 is: 31,034.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,149.81 : 88,742.94 = 20,685.21 : x
  2. Step 2: Convert to fraction form
    59,149.81/88,742.94 = 20,685.21/x
  3. Step 3: Cross multiply
    59,149.81x = 88,742.94 × 20,685.21
  4. Step 4: Simplify right side
    59,149.81x = 1,835,666,349.92
  5. Step 5: Solve for x
    x = 1,835,666,349.92/59,149.81
  6. Step 6: Final answer
    x = 31,034.19

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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.