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Finding the Fourth Proportional to 74,420.91, 102,650.90 and 46,140.57

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Solution

The fourth proportional to 74,420.91, 102,650.90 and 46,140.57 is: 63,643.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,420.91 : 102,650.90 = 46,140.57 : x
  2. Step 2: Convert to fraction form
    74,420.91/102,650.90 = 46,140.57/x
  3. Step 3: Cross multiply
    74,420.91x = 102,650.90 × 46,140.57
  4. Step 4: Simplify right side
    74,420.91x = 4,736,370,806.31
  5. Step 5: Solve for x
    x = 4,736,370,806.31/74,420.91
  6. Step 6: Final answer
    x = 63,643.01

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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.