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Finding the Fourth Proportional to 58,089.72, 87,145.88 and 18,643.80

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Solution

The fourth proportional to 58,089.72, 87,145.88 and 18,643.80 is: 27,969.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,089.72 : 87,145.88 = 18,643.80 : x
  2. Step 2: Convert to fraction form
    58,089.72/87,145.88 = 18,643.80/x
  3. Step 3: Cross multiply
    58,089.72x = 87,145.88 × 18,643.80
  4. Step 4: Simplify right side
    58,089.72x = 1,624,730,357.54
  5. Step 5: Solve for x
    x = 1,624,730,357.54/58,089.72
  6. Step 6: Final answer
    x = 27,969.33

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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.