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Finding the Fourth Proportional to 93,091, 128,455.86 and 52,791.88

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Solution

The fourth proportional to 93,091, 128,455.86 and 52,791.88 is: 72,847.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,091 : 128,455.86 = 52,791.88 : x
  2. Step 2: Convert to fraction form
    93,091/128,455.86 = 52,791.88/x
  3. Step 3: Cross multiply
    93,091x = 128,455.86 × 52,791.88
  4. Step 4: Simplify right side
    93,091x = 6,781,426,346.42
  5. Step 5: Solve for x
    x = 6,781,426,346.42/93,091
  6. Step 6: Final answer
    x = 72,847.28

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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.