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Finding the Fourth Proportional to 121,394,936.80, 182,092,405.20 and 84,406,643.20

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Solution

The fourth proportional to 121,394,936.80, 182,092,405.20 and 84,406,643.20 is: 126,609,964.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,394,936.80 : 182,092,405.20 = 84,406,643.20 : x
  2. Step 2: Convert to fraction form
    121,394,936.80/182,092,405.20 = 84,406,643.20/x
  3. Step 3: Cross multiply
    121,394,936.80x = 182,092,405.20 × 84,406,643.20
  4. Step 4: Simplify right side
    121,394,936.80x = 15,369,808,675,146,224
  5. Step 5: Solve for x
    x = 15,369,808,675,146,224/121,394,936.80
  6. Step 6: Final answer
    x = 126,609,964.80

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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.