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Finding the Fourth Proportional to 66,943,999.20, 100,415,998.80 and 18,421,759.20

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Solution

The fourth proportional to 66,943,999.20, 100,415,998.80 and 18,421,759.20 is: 27,632,638.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,943,999.20 : 100,415,998.80 = 18,421,759.20 : x
  2. Step 2: Convert to fraction form
    66,943,999.20/100,415,998.80 = 18,421,759.20/x
  3. Step 3: Cross multiply
    66,943,999.20x = 100,415,998.80 × 18,421,759.20
  4. Step 4: Simplify right side
    66,943,999.20x = 1,849,839,349,721,088.75
  5. Step 5: Solve for x
    x = 1,849,839,349,721,088.75/66,943,999.20
  6. Step 6: Final answer
    x = 27,632,638.80

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1.5x scale

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.