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Finding the Fourth Proportional to 65,886.12, 98,829.30 and 19,139.40

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Solution

The fourth proportional to 65,886.12, 98,829.30 and 19,139.40 is: 28,709.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,886.12 : 98,829.30 = 19,139.40 : x
  2. Step 2: Convert to fraction form
    65,886.12/98,829.30 = 19,139.40/x
  3. Step 3: Cross multiply
    65,886.12x = 98,829.30 × 19,139.40
  4. Step 4: Simplify right side
    65,886.12x = 1,891,533,504.42
  5. Step 5: Solve for x
    x = 1,891,533,504.42/65,886.12
  6. Step 6: Final answer
    x = 28,709.13

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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.