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Finding the Fourth Proportional to 93,197.78, 128,501.62 and 76,139.18

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Solution

The fourth proportional to 93,197.78, 128,501.62 and 76,139.18 is: 104,981.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,197.78 : 128,501.62 = 76,139.18 : x
  2. Step 2: Convert to fraction form
    93,197.78/128,501.62 = 76,139.18/x
  3. Step 3: Cross multiply
    93,197.78x = 128,501.62 × 76,139.18
  4. Step 4: Simplify right side
    93,197.78x = 9,784,007,332.96
  5. Step 5: Solve for x
    x = 9,784,007,332.96/93,197.78
  6. Step 6: Final answer
    x = 104,981.13

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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.