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Finding the Fourth Proportional to 138,420,452.90, 207,630,679.35 and 138,420,452.90

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Solution

The fourth proportional to 138,420,452.90, 207,630,679.35 and 138,420,452.90 is: 207,630,679.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,420,452.90 : 207,630,679.35 = 138,420,452.90 : x
  2. Step 2: Convert to fraction form
    138,420,452.90/207,630,679.35 = 138,420,452.90/x
  3. Step 3: Cross multiply
    138,420,452.90x = 207,630,679.35 × 138,420,452.90
  4. Step 4: Simplify right side
    138,420,452.90x = 28,740,332,671,561,680
  5. Step 5: Solve for x
    x = 28,740,332,671,561,680/138,420,452.90
  6. Step 6: Final answer
    x = 207,630,679.35

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1.5x scale

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.