Home / 428,723,102.30-643,123,014.65-166,401,503.45

Finding the Fourth Proportional to 428,723,102.30, 643,123,014.65 and 166,401,503.45

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Solution

The fourth proportional to 428,723,102.30, 643,123,014.65 and 166,401,503.45 is: 249,617,144.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,723,102.30 : 643,123,014.65 = 166,401,503.45 : x
  2. Step 2: Convert to fraction form
    428,723,102.30/643,123,014.65 = 166,401,503.45/x
  3. Step 3: Cross multiply
    428,723,102.30x = 643,123,014.65 × 166,401,503.45
  4. Step 4: Simplify right side
    428,723,102.30x = 107,016,636,537,008,752
  5. Step 5: Solve for x
    x = 107,016,636,537,008,752/428,723,102.30
  6. Step 6: Final answer
    x = 249,617,144.41

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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.