Home / 420,828,671.40-631,243,007.10-129,669,862.20

Finding the Fourth Proportional to 420,828,671.40, 631,243,007.10 and 129,669,862.20

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Solution

The fourth proportional to 420,828,671.40, 631,243,007.10 and 129,669,862.20 is: 194,504,793.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,828,671.40 : 631,243,007.10 = 129,669,862.20 : x
  2. Step 2: Convert to fraction form
    420,828,671.40/631,243,007.10 = 129,669,862.20/x
  3. Step 3: Cross multiply
    420,828,671.40x = 631,243,007.10 × 129,669,862.20
  4. Step 4: Simplify right side
    420,828,671.40x = 81,853,193,745,370,624
  5. Step 5: Solve for x
    x = 81,853,193,745,370,624/420,828,671.40
  6. Step 6: Final answer
    x = 194,504,793.30

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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.