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Finding the Fourth Proportional to 93,312, 128,775.68 and 53,570.56

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Solution

The fourth proportional to 93,312, 128,775.68 and 53,570.56 is: 73,930.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,312 : 128,775.68 = 53,570.56 : x
  2. Step 2: Convert to fraction form
    93,312/128,775.68 = 53,570.56/x
  3. Step 3: Cross multiply
    93,312x = 128,775.68 × 53,570.56
  4. Step 4: Simplify right side
    93,312x = 6,898,585,291.98
  5. Step 5: Solve for x
    x = 6,898,585,291.98/93,312
  6. Step 6: Final answer
    x = 73,930.31

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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.