Home / 121,295.40-181,943.10-76,972.20

Finding the Fourth Proportional to 121,295.40, 181,943.10 and 76,972.20

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Solution

The fourth proportional to 121,295.40, 181,943.10 and 76,972.20 is: 115,458.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,295.40 : 181,943.10 = 76,972.20 : x
  2. Step 2: Convert to fraction form
    121,295.40/181,943.10 = 76,972.20/x
  3. Step 3: Cross multiply
    121,295.40x = 181,943.10 × 76,972.20
  4. Step 4: Simplify right side
    121,295.40x = 14,004,560,681.82
  5. Step 5: Solve for x
    x = 14,004,560,681.82/121,295.40
  6. Step 6: Final answer
    x = 115,458.30

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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.