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Finding the Fourth Proportional to 137,316.80, 205,802.40 and 121,764.80

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Solution

The fourth proportional to 137,316.80, 205,802.40 and 121,764.80 is: 182,493.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,316.80 : 205,802.40 = 121,764.80 : x
  2. Step 2: Convert to fraction form
    137,316.80/205,802.40 = 121,764.80/x
  3. Step 3: Cross multiply
    137,316.80x = 205,802.40 × 121,764.80
  4. Step 4: Simplify right side
    137,316.80x = 25,059,488,075.52
  5. Step 5: Solve for x
    x = 25,059,488,075.52/137,316.80
  6. Step 6: Final answer
    x = 182,493.97

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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.