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Finding the Fourth Proportional to 58,236, 87,367.20 and 21,300

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Solution

The fourth proportional to 58,236, 87,367.20 and 21,300 is: 31,954.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,236 : 87,367.20 = 21,300 : x
  2. Step 2: Convert to fraction form
    58,236/87,367.20 = 21,300/x
  3. Step 3: Cross multiply
    58,236x = 87,367.20 × 21,300
  4. Step 4: Simplify right side
    58,236x = 1,860,921,360
  5. Step 5: Solve for x
    x = 1,860,921,360/58,236
  6. Step 6: Final answer
    x = 31,954.83

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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.