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Finding the Fourth Proportional to 190,848.80, 286,186.80 and 72,480.80

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Solution

The fourth proportional to 190,848.80, 286,186.80 and 72,480.80 is: 108,688.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,848.80 : 286,186.80 = 72,480.80 : x
  2. Step 2: Convert to fraction form
    190,848.80/286,186.80 = 72,480.80/x
  3. Step 3: Cross multiply
    190,848.80x = 286,186.80 × 72,480.80
  4. Step 4: Simplify right side
    190,848.80x = 20,743,048,213.44
  5. Step 5: Solve for x
    x = 20,743,048,213.44/190,848.80
  6. Step 6: Final answer
    x = 108,688.39

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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.