Home / 131,620.51-181,636.11-74,259.75

Finding the Fourth Proportional to 131,620.51, 181,636.11 and 74,259.75

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Solution

The fourth proportional to 131,620.51, 181,636.11 and 74,259.75 is: 102,478.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,620.51 : 181,636.11 = 74,259.75 : x
  2. Step 2: Convert to fraction form
    131,620.51/181,636.11 = 74,259.75/x
  3. Step 3: Cross multiply
    131,620.51x = 181,636.11 × 74,259.75
  4. Step 4: Simplify right side
    131,620.51x = 13,488,252,119.57
  5. Step 5: Solve for x
    x = 13,488,252,119.57/131,620.51
  6. Step 6: Final answer
    x = 102,478.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.