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Finding the Fourth Proportional to 58,709.81, 87,939.90 and 39,745.98

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Solution

The fourth proportional to 58,709.81, 87,939.90 and 39,745.98 is: 59,534.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,709.81 : 87,939.90 = 39,745.98 : x
  2. Step 2: Convert to fraction form
    58,709.81/87,939.90 = 39,745.98/x
  3. Step 3: Cross multiply
    58,709.81x = 87,939.90 × 39,745.98
  4. Step 4: Simplify right side
    58,709.81x = 3,495,257,506.60
  5. Step 5: Solve for x
    x = 3,495,257,506.60/58,709.81
  6. Step 6: Final answer
    x = 59,534.47

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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.