Home / 81,389.10-122,071.95-31,492.74

Finding the Fourth Proportional to 81,389.10, 122,071.95 and 31,492.74

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Solution

The fourth proportional to 81,389.10, 122,071.95 and 31,492.74 is: 47,234.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,389.10 : 122,071.95 = 31,492.74 : x
  2. Step 2: Convert to fraction form
    81,389.10/122,071.95 = 31,492.74/x
  3. Step 3: Cross multiply
    81,389.10x = 122,071.95 × 31,492.74
  4. Step 4: Simplify right side
    81,389.10x = 3,844,380,182.64
  5. Step 5: Solve for x
    x = 3,844,380,182.64/81,389.10
  6. Step 6: Final answer
    x = 47,234.58

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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.