Home / 140,503.90-210,318.45-81,163.30

Finding the Fourth Proportional to 140,503.90, 210,318.45 and 81,163.30

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Solution

The fourth proportional to 140,503.90, 210,318.45 and 81,163.30 is: 121,492.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,503.90 : 210,318.45 = 81,163.30 : x
  2. Step 2: Convert to fraction form
    140,503.90/210,318.45 = 81,163.30/x
  3. Step 3: Cross multiply
    140,503.90x = 210,318.45 × 81,163.30
  4. Step 4: Simplify right side
    140,503.90x = 17,070,139,452.89
  5. Step 5: Solve for x
    x = 17,070,139,452.89/140,503.90
  6. Step 6: Final answer
    x = 121,492.28

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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.