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Finding the Fourth Proportional to 139,968,697.60, 209,953,046.40 and 129,765,030.40

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Solution

The fourth proportional to 139,968,697.60, 209,953,046.40 and 129,765,030.40 is: 194,647,545.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,697.60 : 209,953,046.40 = 129,765,030.40 : x
  2. Step 2: Convert to fraction form
    139,968,697.60/209,953,046.40 = 129,765,030.40/x
  3. Step 3: Cross multiply
    139,968,697.60x = 209,953,046.40 × 129,765,030.40
  4. Step 4: Simplify right side
    139,968,697.60x = 27,244,563,448,668,612
  5. Step 5: Solve for x
    x = 27,244,563,448,668,612/139,968,697.60
  6. Step 6: Final answer
    x = 194,647,545.60

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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.