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Finding the Fourth Proportional to 308,561.51, 462,675.84 and 139,989.85

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Solution

The fourth proportional to 308,561.51, 462,675.84 and 139,989.85 is: 209,909.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,561.51 : 462,675.84 = 139,989.85 : x
  2. Step 2: Convert to fraction form
    308,561.51/462,675.84 = 139,989.85/x
  3. Step 3: Cross multiply
    308,561.51x = 462,675.84 × 139,989.85
  4. Step 4: Simplify right side
    308,561.51x = 64,769,923,345.43
  5. Step 5: Solve for x
    x = 64,769,923,345.43/308,561.51
  6. Step 6: Final answer
    x = 209,909.28

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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.