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Finding the Fourth Proportional to 98,611.28, 136,083.52 and 53,899.28

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Solution

The fourth proportional to 98,611.28, 136,083.52 and 53,899.28 is: 74,380.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,611.28 : 136,083.52 = 53,899.28 : x
  2. Step 2: Convert to fraction form
    98,611.28/136,083.52 = 53,899.28/x
  3. Step 3: Cross multiply
    98,611.28x = 136,083.52 × 53,899.28
  4. Step 4: Simplify right side
    98,611.28x = 7,334,803,747.87
  5. Step 5: Solve for x
    x = 7,334,803,747.87/98,611.28
  6. Step 6: Final answer
    x = 74,380.98

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1.5x scale

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.