Home / 190,309.68-262,635.90-105,421.28

Finding the Fourth Proportional to 190,309.68, 262,635.90 and 105,421.28

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Solution

The fourth proportional to 190,309.68, 262,635.90 and 105,421.28 is: 145,486.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,309.68 : 262,635.90 = 105,421.28 : x
  2. Step 2: Convert to fraction form
    190,309.68/262,635.90 = 105,421.28/x
  3. Step 3: Cross multiply
    190,309.68x = 262,635.90 × 105,421.28
  4. Step 4: Simplify right side
    190,309.68x = 27,687,412,751.95
  5. Step 5: Solve for x
    x = 27,687,412,751.95/190,309.68
  6. Step 6: Final answer
    x = 145,486.10

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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.