Home / 420,550,427.88-630,847,920.06-129,617,375.40

Finding the Fourth Proportional to 420,550,427.88, 630,847,920.06 and 129,617,375.40

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Solution

The fourth proportional to 420,550,427.88, 630,847,920.06 and 129,617,375.40 is: 194,432,929.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,550,427.88 : 630,847,920.06 = 129,617,375.40 : x
  2. Step 2: Convert to fraction form
    420,550,427.88/630,847,920.06 = 129,617,375.40/x
  3. Step 3: Cross multiply
    420,550,427.88x = 630,847,920.06 × 129,617,375.40
  4. Step 4: Simplify right side
    420,550,427.88x = 81,768,851,674,726,208
  5. Step 5: Solve for x
    x = 81,768,851,674,726,208/420,550,427.88
  6. Step 6: Final answer
    x = 194,432,929.45

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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.