Home / 420,815,626.80-631,237,874.40-129,680,437.20

Finding the Fourth Proportional to 420,815,626.80, 631,237,874.40 and 129,680,437.20

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Solution

The fourth proportional to 420,815,626.80, 631,237,874.40 and 129,680,437.20 is: 194,525,103.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,815,626.80 : 631,237,874.40 = 129,680,437.20 : x
  2. Step 2: Convert to fraction form
    420,815,626.80/631,237,874.40 = 129,680,437.20/x
  3. Step 3: Cross multiply
    420,815,626.80x = 631,237,874.40 × 129,680,437.20
  4. Step 4: Simplify right side
    420,815,626.80x = 81,859,203,529,390,688
  5. Step 5: Solve for x
    x = 81,859,203,529,390,688/420,815,626.80
  6. Step 6: Final answer
    x = 194,525,103.91

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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.