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Finding the Fourth Proportional to 98,587.80, 147,590.10 and 92,820.60

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Solution

The fourth proportional to 98,587.80, 147,590.10 and 92,820.60 is: 138,956.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,587.80 : 147,590.10 = 92,820.60 : x
  2. Step 2: Convert to fraction form
    98,587.80/147,590.10 = 92,820.60/x
  3. Step 3: Cross multiply
    98,587.80x = 147,590.10 × 92,820.60
  4. Step 4: Simplify right side
    98,587.80x = 13,699,401,636.06
  5. Step 5: Solve for x
    x = 13,699,401,636.06/98,587.80
  6. Step 6: Final answer
    x = 138,956.36

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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.