Home / 81,683.08-122,492.88-31,756.57

Finding the Fourth Proportional to 81,683.08, 122,492.88 and 31,756.57

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Solution

The fourth proportional to 81,683.08, 122,492.88 and 31,756.57 is: 47,622.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,683.08 : 122,492.88 = 31,756.57 : x
  2. Step 2: Convert to fraction form
    81,683.08/122,492.88 = 31,756.57/x
  3. Step 3: Cross multiply
    81,683.08x = 122,492.88 × 31,756.57
  4. Step 4: Simplify right side
    81,683.08x = 3,889,953,718.22
  5. Step 5: Solve for x
    x = 3,889,953,718.22/81,683.08
  6. Step 6: Final answer
    x = 47,622.52

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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.