Home / 190,130.10-285,276.69-90,360.78

Finding the Fourth Proportional to 190,130.10, 285,276.69 and 90,360.78

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Solution

The fourth proportional to 190,130.10, 285,276.69 and 90,360.78 is: 135,579.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,130.10 : 285,276.69 = 90,360.78 : x
  2. Step 2: Convert to fraction form
    190,130.10/285,276.69 = 90,360.78/x
  3. Step 3: Cross multiply
    190,130.10x = 285,276.69 × 90,360.78
  4. Step 4: Simplify right side
    190,130.10x = 25,777,824,224.22
  5. Step 5: Solve for x
    x = 25,777,824,224.22/190,130.10
  6. Step 6: Final answer
    x = 135,579.92

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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.