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Finding the Fourth Proportional to 139,235,658.90, 208,853,488.35 and 139,235,658.90

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Solution

The fourth proportional to 139,235,658.90, 208,853,488.35 and 139,235,658.90 is: 208,853,488.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,235,658.90 : 208,853,488.35 = 139,235,658.90 : x
  2. Step 2: Convert to fraction form
    139,235,658.90/208,853,488.35 = 139,235,658.90/x
  3. Step 3: Cross multiply
    139,235,658.90x = 208,853,488.35 × 139,235,658.90
  4. Step 4: Simplify right side
    139,235,658.90x = 29,079,853,063,975,724
  5. Step 5: Solve for x
    x = 29,079,853,063,975,724/139,235,658.90
  6. Step 6: Final answer
    x = 208,853,488.35

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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.