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Finding the Fourth Proportional to 274,580,212.80, 411,670,625.04 and 128,938,726.56

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Solution

The fourth proportional to 274,580,212.80, 411,670,625.04 and 128,938,726.56 is: 193,314,316.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,580,212.80 : 411,670,625.04 = 128,938,726.56 : x
  2. Step 2: Convert to fraction form
    274,580,212.80/411,670,625.04 = 128,938,726.56/x
  3. Step 3: Cross multiply
    274,580,212.80x = 411,670,625.04 × 128,938,726.56
  4. Step 4: Simplify right side
    274,580,212.80x = 53,080,286,154,816,856
  5. Step 5: Solve for x
    x = 53,080,286,154,816,856/274,580,212.80
  6. Step 6: Final answer
    x = 193,314,316.47

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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.