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Finding the Fourth Proportional to 58,271.78, 87,408.18 and 18,828.90

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Solution

The fourth proportional to 58,271.78, 87,408.18 and 18,828.90 is: 28,243.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,271.78 : 87,408.18 = 18,828.90 : x
  2. Step 2: Convert to fraction form
    58,271.78/87,408.18 = 18,828.90/x
  3. Step 3: Cross multiply
    58,271.78x = 87,408.18 × 18,828.90
  4. Step 4: Simplify right side
    58,271.78x = 1,645,799,880.40
  5. Step 5: Solve for x
    x = 1,645,799,880.40/58,271.78
  6. Step 6: Final answer
    x = 28,243.51

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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.