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Finding the Fourth Proportional to 190,810.80, 286,358.40 and 72,712.80

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Solution

The fourth proportional to 190,810.80, 286,358.40 and 72,712.80 is: 109,123.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,810.80 : 286,358.40 = 72,712.80 : x
  2. Step 2: Convert to fraction form
    190,810.80/286,358.40 = 72,712.80/x
  3. Step 3: Cross multiply
    190,810.80x = 286,358.40 × 72,712.80
  4. Step 4: Simplify right side
    190,810.80x = 20,821,921,067.52
  5. Step 5: Solve for x
    x = 20,821,921,067.52/190,810.80
  6. Step 6: Final answer
    x = 109,123.39

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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.