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Finding the Fourth Proportional to 190,890.60, 286,374.30 and 66,205.80

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Solution

The fourth proportional to 190,890.60, 286,374.30 and 66,205.80 is: 99,322.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,890.60 : 286,374.30 = 66,205.80 : x
  2. Step 2: Convert to fraction form
    190,890.60/286,374.30 = 66,205.80/x
  3. Step 3: Cross multiply
    190,890.60x = 286,374.30 × 66,205.80
  4. Step 4: Simplify right side
    190,890.60x = 18,959,639,630.94
  5. Step 5: Solve for x
    x = 18,959,639,630.94/190,890.60
  6. Step 6: Final answer
    x = 99,322.02

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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.