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Finding the Fourth Proportional to 58,185.55, 87,285.16 and 20,750.94

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Solution

The fourth proportional to 58,185.55, 87,285.16 and 20,750.94 is: 31,128.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,185.55 : 87,285.16 = 20,750.94 : x
  2. Step 2: Convert to fraction form
    58,185.55/87,285.16 = 20,750.94/x
  3. Step 3: Cross multiply
    58,185.55x = 87,285.16 × 20,750.94
  4. Step 4: Simplify right side
    58,185.55x = 1,811,249,118.05
  5. Step 5: Solve for x
    x = 1,811,249,118.05/58,185.55
  6. Step 6: Final answer
    x = 31,128.85

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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.