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Finding the Fourth Proportional to 58,717.64, 80,918.48 and 57,638.01

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Solution

The fourth proportional to 58,717.64, 80,918.48 and 57,638.01 is: 79,430.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,717.64 : 80,918.48 = 57,638.01 : x
  2. Step 2: Convert to fraction form
    58,717.64/80,918.48 = 57,638.01/x
  3. Step 3: Cross multiply
    58,717.64x = 80,918.48 × 57,638.01
  4. Step 4: Simplify right side
    58,717.64x = 4,663,979,871.23
  5. Step 5: Solve for x
    x = 4,663,979,871.23/58,717.64
  6. Step 6: Final answer
    x = 79,430.65

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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.