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Finding the Fourth Proportional to 93,020.40, 128,366.64 and 50,580

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Solution

The fourth proportional to 93,020.40, 128,366.64 and 50,580 is: 69,799.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,020.40 : 128,366.64 = 50,580 : x
  2. Step 2: Convert to fraction form
    93,020.40/128,366.64 = 50,580/x
  3. Step 3: Cross multiply
    93,020.40x = 128,366.64 × 50,580
  4. Step 4: Simplify right side
    93,020.40x = 6,492,784,651.20
  5. Step 5: Solve for x
    x = 6,492,784,651.20/93,020.40
  6. Step 6: Final answer
    x = 69,799.58

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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.