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Finding the Fourth Proportional to 139,969,253.80, 209,953,880.70 and 130,403,315.80

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Solution

The fourth proportional to 139,969,253.80, 209,953,880.70 and 130,403,315.80 is: 195,604,973.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,253.80 : 209,953,880.70 = 130,403,315.80 : x
  2. Step 2: Convert to fraction form
    139,969,253.80/209,953,880.70 = 130,403,315.80/x
  3. Step 3: Cross multiply
    139,969,253.80x = 209,953,880.70 × 130,403,315.80
  4. Step 4: Simplify right side
    139,969,253.80x = 27,378,682,208,357,624
  5. Step 5: Solve for x
    x = 27,378,682,208,357,624/139,969,253.80
  6. Step 6: Final answer
    x = 195,604,973.70

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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.