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Finding the Fourth Proportional to 139,566,408.30, 209,349,612.45 and 139,566,408.30

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Solution

The fourth proportional to 139,566,408.30, 209,349,612.45 and 139,566,408.30 is: 209,349,612.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,566,408.30 : 209,349,612.45 = 139,566,408.30 : x
  2. Step 2: Convert to fraction form
    139,566,408.30/209,349,612.45 = 139,566,408.30/x
  3. Step 3: Cross multiply
    139,566,408.30x = 209,349,612.45 × 139,566,408.30
  4. Step 4: Simplify right side
    139,566,408.30x = 29,218,173,488,643,464
  5. Step 5: Solve for x
    x = 29,218,173,488,643,464/139,566,408.30
  6. Step 6: Final answer
    x = 209,349,612.45

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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.