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Finding the Fourth Proportional to 58,809.71, 81,139.53 and 33,312.03

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Solution

The fourth proportional to 58,809.71, 81,139.53 and 33,312.03 is: 45,960.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,809.71 : 81,139.53 = 33,312.03 : x
  2. Step 2: Convert to fraction form
    58,809.71/81,139.53 = 33,312.03/x
  3. Step 3: Cross multiply
    58,809.71x = 81,139.53 × 33,312.03
  4. Step 4: Simplify right side
    58,809.71x = 2,702,922,457.55
  5. Step 5: Solve for x
    x = 2,702,922,457.55/58,809.71
  6. Step 6: Final answer
    x = 45,960.48

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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.