Home / 420,095,467.20-630,143,200.80-216,022,123.20

Finding the Fourth Proportional to 420,095,467.20, 630,143,200.80 and 216,022,123.20

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Solution

The fourth proportional to 420,095,467.20, 630,143,200.80 and 216,022,123.20 is: 324,033,184.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,095,467.20 : 630,143,200.80 = 216,022,123.20 : x
  2. Step 2: Convert to fraction form
    420,095,467.20/630,143,200.80 = 216,022,123.20/x
  3. Step 3: Cross multiply
    420,095,467.20x = 630,143,200.80 × 216,022,123.20
  4. Step 4: Simplify right side
    420,095,467.20x = 136,124,872,156,859,920
  5. Step 5: Solve for x
    x = 136,124,872,156,859,920/420,095,467.20
  6. Step 6: Final answer
    x = 324,033,184.80

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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.