Home / 428,723,103.30-643,123,016.15-166,401,504.45

Finding the Fourth Proportional to 428,723,103.30, 643,123,016.15 and 166,401,504.45

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Solution

The fourth proportional to 428,723,103.30, 643,123,016.15 and 166,401,504.45 is: 249,617,145.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,723,103.30 : 643,123,016.15 = 166,401,504.45 : x
  2. Step 2: Convert to fraction form
    428,723,103.30/643,123,016.15 = 166,401,504.45/x
  3. Step 3: Cross multiply
    428,723,103.30x = 643,123,016.15 × 166,401,504.45
  4. Step 4: Simplify right side
    428,723,103.30x = 107,016,637,433,781,632
  5. Step 5: Solve for x
    x = 107,016,637,433,781,632/428,723,103.30
  6. Step 6: Final answer
    x = 249,617,145.92

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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.