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Finding the Fourth Proportional to 190,603.80, 286,019.10 and 72,287.10

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Solution

The fourth proportional to 190,603.80, 286,019.10 and 72,287.10 is: 108,473.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,603.80 : 286,019.10 = 72,287.10 : x
  2. Step 2: Convert to fraction form
    190,603.80/286,019.10 = 72,287.10/x
  3. Step 3: Cross multiply
    190,603.80x = 286,019.10 × 72,287.10
  4. Step 4: Simplify right side
    190,603.80x = 20,675,491,283.61
  5. Step 5: Solve for x
    x = 20,675,491,283.61/190,603.80
  6. Step 6: Final answer
    x = 108,473.66

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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.