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Finding the Fourth Proportional to 190,909.80, 286,364.70 and 66,250.80

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Solution

The fourth proportional to 190,909.80, 286,364.70 and 66,250.80 is: 99,376.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,909.80 : 286,364.70 = 66,250.80 : x
  2. Step 2: Convert to fraction form
    190,909.80/286,364.70 = 66,250.80/x
  3. Step 3: Cross multiply
    190,909.80x = 286,364.70 × 66,250.80
  4. Step 4: Simplify right side
    190,909.80x = 18,971,890,466.76
  5. Step 5: Solve for x
    x = 18,971,890,466.76/190,909.80
  6. Step 6: Final answer
    x = 99,376.20

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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.