Home / 428,970.00-643,452.20-109,119.12

Finding the Fourth Proportional to 428,970.00, 643,452.20 and 109,119.12

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Solution

The fourth proportional to 428,970.00, 643,452.20 and 109,119.12 is: 163,677.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,970.00 : 643,452.20 = 109,119.12 : x
  2. Step 2: Convert to fraction form
    428,970.00/643,452.20 = 109,119.12/x
  3. Step 3: Cross multiply
    428,970.00x = 643,452.20 × 109,119.12
  4. Step 4: Simplify right side
    428,970.00x = 70,212,941,319.64
  5. Step 5: Solve for x
    x = 70,212,941,319.64/428,970.00
  6. Step 6: Final answer
    x = 163,677.98

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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.