Home / 81,658.42-122,439.95-31,680.11

Finding the Fourth Proportional to 81,658.42, 122,439.95 and 31,680.11

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Solution

The fourth proportional to 81,658.42, 122,439.95 and 31,680.11 is: 47,501.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,658.42 : 122,439.95 = 31,680.11 : x
  2. Step 2: Convert to fraction form
    81,658.42/122,439.95 = 31,680.11/x
  3. Step 3: Cross multiply
    81,658.42x = 122,439.95 × 31,680.11
  4. Step 4: Simplify right side
    81,658.42x = 3,878,911,084.39
  5. Step 5: Solve for x
    x = 3,878,911,084.39/81,658.42
  6. Step 6: Final answer
    x = 47,501.67

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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.