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Finding the Fourth Proportional to 121,315.20, 181,940.40 and 37,075.20

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Solution

The fourth proportional to 121,315.20, 181,940.40 and 37,075.20 is: 55,602.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,315.20 : 181,940.40 = 37,075.20 : x
  2. Step 2: Convert to fraction form
    121,315.20/181,940.40 = 37,075.20/x
  3. Step 3: Cross multiply
    121,315.20x = 181,940.40 × 37,075.20
  4. Step 4: Simplify right side
    121,315.20x = 6,745,476,718.08
  5. Step 5: Solve for x
    x = 6,745,476,718.08/121,315.20
  6. Step 6: Final answer
    x = 55,602.90

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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.