Home / 420,550,428.88-630,847,921.56-129,617,376.40

Finding the Fourth Proportional to 420,550,428.88, 630,847,921.56 and 129,617,376.40

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Solution

The fourth proportional to 420,550,428.88, 630,847,921.56 and 129,617,376.40 is: 194,432,930.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,550,428.88 : 630,847,921.56 = 129,617,376.40 : x
  2. Step 2: Convert to fraction form
    420,550,428.88/630,847,921.56 = 129,617,376.40/x
  3. Step 3: Cross multiply
    420,550,428.88x = 630,847,921.56 × 129,617,376.40
  4. Step 4: Simplify right side
    420,550,428.88x = 81,768,852,500,000,192
  5. Step 5: Solve for x
    x = 81,768,852,500,000,192/420,550,428.88
  6. Step 6: Final answer
    x = 194,432,930.95

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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.