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Finding the Fourth Proportional to 77,681.57, 107,184.47 and 45,409.92

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Solution

The fourth proportional to 77,681.57, 107,184.47 and 45,409.92 is: 62,656.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,681.57 : 107,184.47 = 45,409.92 : x
  2. Step 2: Convert to fraction form
    77,681.57/107,184.47 = 45,409.92/x
  3. Step 3: Cross multiply
    77,681.57x = 107,184.47 × 45,409.92
  4. Step 4: Simplify right side
    77,681.57x = 4,867,237,578.95
  5. Step 5: Solve for x
    x = 4,867,237,578.95/77,681.57
  6. Step 6: Final answer
    x = 62,656.28

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1.5x scale

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.