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Finding the Fourth Proportional to 93,820.79, 129,420.17 and 55,543.00

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Solution

The fourth proportional to 93,820.79, 129,420.17 and 55,543.00 is: 76,618.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,820.79 : 129,420.17 = 55,543.00 : x
  2. Step 2: Convert to fraction form
    93,820.79/129,420.17 = 55,543.00/x
  3. Step 3: Cross multiply
    93,820.79x = 129,420.17 × 55,543.00
  4. Step 4: Simplify right side
    93,820.79x = 7,188,384,317.62
  5. Step 5: Solve for x
    x = 7,188,384,317.62/93,820.79
  6. Step 6: Final answer
    x = 76,618.25

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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.