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Finding the Fourth Proportional to 121,270.40, 181,840.80 and 51,070.40

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Solution

The fourth proportional to 121,270.40, 181,840.80 and 51,070.40 is: 76,578.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,270.40 : 181,840.80 = 51,070.40 : x
  2. Step 2: Convert to fraction form
    121,270.40/181,840.80 = 51,070.40/x
  3. Step 3: Cross multiply
    121,270.40x = 181,840.80 × 51,070.40
  4. Step 4: Simplify right side
    121,270.40x = 9,286,682,392.32
  5. Step 5: Solve for x
    x = 9,286,682,392.32/121,270.40
  6. Step 6: Final answer
    x = 76,578.31

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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.