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Finding the Fourth Proportional to 190,862.60, 286,293.90 and 120,003.80

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Solution

The fourth proportional to 190,862.60, 286,293.90 and 120,003.80 is: 180,005.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,862.60 : 286,293.90 = 120,003.80 : x
  2. Step 2: Convert to fraction form
    190,862.60/286,293.90 = 120,003.80/x
  3. Step 3: Cross multiply
    190,862.60x = 286,293.90 × 120,003.80
  4. Step 4: Simplify right side
    190,862.60x = 34,356,355,916.82
  5. Step 5: Solve for x
    x = 34,356,355,916.82/190,862.60
  6. Step 6: Final answer
    x = 180,005.70

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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.