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Finding the Fourth Proportional to 139,968,708.60, 209,953,062.90 and 129,765,041.40

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Solution

The fourth proportional to 139,968,708.60, 209,953,062.90 and 129,765,041.40 is: 194,647,562.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,708.60 : 209,953,062.90 = 129,765,041.40 : x
  2. Step 2: Convert to fraction form
    139,968,708.60/209,953,062.90 = 129,765,041.40/x
  3. Step 3: Cross multiply
    139,968,708.60x = 209,953,062.90 × 129,765,041.40
  4. Step 4: Simplify right side
    139,968,708.60x = 27,244,567,899,275,308
  5. Step 5: Solve for x
    x = 27,244,567,899,275,308/139,968,708.60
  6. Step 6: Final answer
    x = 194,647,562.10

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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.