Home / 139,120.56-191,987.28-75,461.04

Finding the Fourth Proportional to 139,120.56, 191,987.28 and 75,461.04

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Solution

The fourth proportional to 139,120.56, 191,987.28 and 75,461.04 is: 104,136.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,120.56 : 191,987.28 = 75,461.04 : x
  2. Step 2: Convert to fraction form
    139,120.56/191,987.28 = 75,461.04/x
  3. Step 3: Cross multiply
    139,120.56x = 191,987.28 × 75,461.04
  4. Step 4: Simplify right side
    139,120.56x = 14,487,559,815.57
  5. Step 5: Solve for x
    x = 14,487,559,815.57/139,120.56
  6. Step 6: Final answer
    x = 104,136.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.