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Finding the Fourth Proportional to 190,983.60, 286,475.40 and 66,324.60

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Solution

The fourth proportional to 190,983.60, 286,475.40 and 66,324.60 is: 99,486.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,983.60 : 286,475.40 = 66,324.60 : x
  2. Step 2: Convert to fraction form
    190,983.60/286,475.40 = 66,324.60/x
  3. Step 3: Cross multiply
    190,983.60x = 286,475.40 × 66,324.60
  4. Step 4: Simplify right side
    190,983.60x = 19,000,366,314.84
  5. Step 5: Solve for x
    x = 19,000,366,314.84/190,983.60
  6. Step 6: Final answer
    x = 99,486.90

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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.