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Finding the Fourth Proportional to 134,857,674.47, 186,103,590.99 and 72,978,013.03

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Solution

The fourth proportional to 134,857,674.47, 186,103,590.99 and 72,978,013.03 is: 100,709,658.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,857,674.47 : 186,103,590.99 = 72,978,013.03 : x
  2. Step 2: Convert to fraction form
    134,857,674.47/186,103,590.99 = 72,978,013.03/x
  3. Step 3: Cross multiply
    134,857,674.47x = 186,103,590.99 × 72,978,013.03
  4. Step 4: Simplify right side
    134,857,674.47x = 13,581,470,288,198,012
  5. Step 5: Solve for x
    x = 13,581,470,288,198,012/134,857,674.47
  6. Step 6: Final answer
    x = 100,709,658.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.