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Finding the Fourth Proportional to 58,784.36, 81,075.50 and 38,661.90

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Solution

The fourth proportional to 58,784.36, 81,075.50 and 38,661.90 is: 53,322.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,784.36 : 81,075.50 = 38,661.90 : x
  2. Step 2: Convert to fraction form
    58,784.36/81,075.50 = 38,661.90/x
  3. Step 3: Cross multiply
    58,784.36x = 81,075.50 × 38,661.90
  4. Step 4: Simplify right side
    58,784.36x = 3,134,532,873.45
  5. Step 5: Solve for x
    x = 3,134,532,873.45/58,784.36
  6. Step 6: Final answer
    x = 53,322.57

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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.