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Finding the Fourth Proportional to 210,999.90, 316,499.88 and 63,255.90

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Solution

The fourth proportional to 210,999.90, 316,499.88 and 63,255.90 is: 94,883.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,999.90 : 316,499.88 = 63,255.90 : x
  2. Step 2: Convert to fraction form
    210,999.90/316,499.88 = 63,255.90/x
  3. Step 3: Cross multiply
    210,999.90x = 316,499.88 × 63,255.90
  4. Step 4: Simplify right side
    210,999.90x = 20,020,484,759.29
  5. Step 5: Solve for x
    x = 20,020,484,759.29/210,999.90
  6. Step 6: Final answer
    x = 94,883.86

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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.