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Finding the Fourth Proportional to 108,031.60, 161,909.70 and 60,646.60

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Solution

The fourth proportional to 108,031.60, 161,909.70 and 60,646.60 is: 90,892.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,031.60 : 161,909.70 = 60,646.60 : x
  2. Step 2: Convert to fraction form
    108,031.60/161,909.70 = 60,646.60/x
  3. Step 3: Cross multiply
    108,031.60x = 161,909.70 × 60,646.60
  4. Step 4: Simplify right side
    108,031.60x = 9,819,272,812.02
  5. Step 5: Solve for x
    x = 9,819,272,812.02/108,031.60
  6. Step 6: Final answer
    x = 90,892.60

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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.