Home / 142,372.10-213,266.55-72,290.90

Finding the Fourth Proportional to 142,372.10, 213,266.55 and 72,290.90

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Solution

The fourth proportional to 142,372.10, 213,266.55 and 72,290.90 is: 108,288.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,372.10 : 213,266.55 = 72,290.90 : x
  2. Step 2: Convert to fraction form
    142,372.10/213,266.55 = 72,290.90/x
  3. Step 3: Cross multiply
    142,372.10x = 213,266.55 × 72,290.90
  4. Step 4: Simplify right side
    142,372.10x = 15,417,230,839.40
  5. Step 5: Solve for x
    x = 15,417,230,839.40/142,372.10
  6. Step 6: Final answer
    x = 108,288.29

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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.