Home / 145,428.20-218,069.40-66,453.20

Finding the Fourth Proportional to 145,428.20, 218,069.40 and 66,453.20

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Solution

The fourth proportional to 145,428.20, 218,069.40 and 66,453.20 is: 99,646.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,428.20 : 218,069.40 = 66,453.20 : x
  2. Step 2: Convert to fraction form
    145,428.20/218,069.40 = 66,453.20/x
  3. Step 3: Cross multiply
    145,428.20x = 218,069.40 × 66,453.20
  4. Step 4: Simplify right side
    145,428.20x = 14,491,409,452.08
  5. Step 5: Solve for x
    x = 14,491,409,452.08/145,428.20
  6. Step 6: Final answer
    x = 99,646.49

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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.