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Finding the Fourth Proportional to 61,161.51, 84,389.40 and 59,145.56

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Solution

The fourth proportional to 61,161.51, 84,389.40 and 59,145.56 is: 81,607.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,161.51 : 84,389.40 = 59,145.56 : x
  2. Step 2: Convert to fraction form
    61,161.51/84,389.40 = 59,145.56/x
  3. Step 3: Cross multiply
    61,161.51x = 84,389.40 × 59,145.56
  4. Step 4: Simplify right side
    61,161.51x = 4,991,257,899.12
  5. Step 5: Solve for x
    x = 4,991,257,899.12/61,161.51
  6. Step 6: Final answer
    x = 81,607.83

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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.