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Finding the Fourth Proportional to 58,580.57, 87,852.69 and 21,135.78

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Solution

The fourth proportional to 58,580.57, 87,852.69 and 21,135.78 is: 31,697.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,580.57 : 87,852.69 = 21,135.78 : x
  2. Step 2: Convert to fraction form
    58,580.57/87,852.69 = 21,135.78/x
  3. Step 3: Cross multiply
    58,580.57x = 87,852.69 × 21,135.78
  4. Step 4: Simplify right side
    58,580.57x = 1,856,835,128.25
  5. Step 5: Solve for x
    x = 1,856,835,128.25/58,580.57
  6. Step 6: Final answer
    x = 31,697.12

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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.