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Finding the Fourth Proportional to 203,630,602.60, 305,445,903.90 and 67,315,986.10

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Solution

The fourth proportional to 203,630,602.60, 305,445,903.90 and 67,315,986.10 is: 100,973,979.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,630,602.60 : 305,445,903.90 = 67,315,986.10 : x
  2. Step 2: Convert to fraction form
    203,630,602.60/305,445,903.90 = 67,315,986.10/x
  3. Step 3: Cross multiply
    203,630,602.60x = 305,445,903.90 × 67,315,986.10
  4. Step 4: Simplify right side
    203,630,602.60x = 20,561,392,221,234,332
  5. Step 5: Solve for x
    x = 20,561,392,221,234,332/203,630,602.60
  6. Step 6: Final answer
    x = 100,973,979.15

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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.