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Finding the Fourth Proportional to 190,564.80, 285,847.20 and 65,918.40

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Solution

The fourth proportional to 190,564.80, 285,847.20 and 65,918.40 is: 98,877.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,564.80 : 285,847.20 = 65,918.40 : x
  2. Step 2: Convert to fraction form
    190,564.80/285,847.20 = 65,918.40/x
  3. Step 3: Cross multiply
    190,564.80x = 285,847.20 × 65,918.40
  4. Step 4: Simplify right side
    190,564.80x = 18,842,590,068.48
  5. Step 5: Solve for x
    x = 18,842,590,068.48/190,564.80
  6. Step 6: Final answer
    x = 98,877.60

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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.