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Finding the Fourth Proportional to 98,967.90, 136,573.11 and 53,643.90

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Solution

The fourth proportional to 98,967.90, 136,573.11 and 53,643.90 is: 74,027.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,967.90 : 136,573.11 = 53,643.90 : x
  2. Step 2: Convert to fraction form
    98,967.90/136,573.11 = 53,643.90/x
  3. Step 3: Cross multiply
    98,967.90x = 136,573.11 × 53,643.90
  4. Step 4: Simplify right side
    98,967.90x = 7,326,314,255.53
  5. Step 5: Solve for x
    x = 7,326,314,255.53/98,967.90
  6. Step 6: Final answer
    x = 74,027.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.