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Finding the Fourth Proportional to 190,820.80, 286,373.40 and 72,722.80

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Solution

The fourth proportional to 190,820.80, 286,373.40 and 72,722.80 is: 109,138.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,820.80 : 286,373.40 = 72,722.80 : x
  2. Step 2: Convert to fraction form
    190,820.80/286,373.40 = 72,722.80/x
  3. Step 3: Cross multiply
    190,820.80x = 286,373.40 × 72,722.80
  4. Step 4: Simplify right side
    190,820.80x = 20,825,875,493.52
  5. Step 5: Solve for x
    x = 20,825,875,493.52/190,820.80
  6. Step 6: Final answer
    x = 109,138.39

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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.