Home / 190,881.90-286,432.20-72,638.10

Finding the Fourth Proportional to 190,881.90, 286,432.20 and 72,638.10

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Solution

The fourth proportional to 190,881.90, 286,432.20 and 72,638.10 is: 108,998.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,881.90 : 286,432.20 = 72,638.10 : x
  2. Step 2: Convert to fraction form
    190,881.90/286,432.20 = 72,638.10/x
  3. Step 3: Cross multiply
    190,881.90x = 286,432.20 × 72,638.10
  4. Step 4: Simplify right side
    190,881.90x = 20,805,890,786.82
  5. Step 5: Solve for x
    x = 20,805,890,786.82/190,881.90
  6. Step 6: Final answer
    x = 108,998.76

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1.5x scale

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.