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Finding the Fourth Proportional to 139,164,465.70, 208,746,698.55 and 84,744,907.30

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Solution

The fourth proportional to 139,164,465.70, 208,746,698.55 and 84,744,907.30 is: 127,117,360.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,164,465.70 : 208,746,698.55 = 84,744,907.30 : x
  2. Step 2: Convert to fraction form
    139,164,465.70/208,746,698.55 = 84,744,907.30/x
  3. Step 3: Cross multiply
    139,164,465.70x = 208,746,698.55 × 84,744,907.30
  4. Step 4: Simplify right side
    139,164,465.70x = 17,690,219,617,800,794
  5. Step 5: Solve for x
    x = 17,690,219,617,800,794/139,164,465.70
  6. Step 6: Final answer
    x = 127,117,360.95

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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.