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Finding the Fourth Proportional to 103,491.56, 155,238.35 and 56,718.92

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Solution

The fourth proportional to 103,491.56, 155,238.35 and 56,718.92 is: 85,078.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,491.56 : 155,238.35 = 56,718.92 : x
  2. Step 2: Convert to fraction form
    103,491.56/155,238.35 = 56,718.92/x
  3. Step 3: Cross multiply
    103,491.56x = 155,238.35 × 56,718.92
  4. Step 4: Simplify right side
    103,491.56x = 8,804,950,494.80
  5. Step 5: Solve for x
    x = 8,804,950,494.80/103,491.56
  6. Step 6: Final answer
    x = 85,078.93

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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.