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Finding the Fourth Proportional to 58,676.40, 87,991.56 and 20,717.57

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Solution

The fourth proportional to 58,676.40, 87,991.56 and 20,717.57 is: 31,068.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,676.40 : 87,991.56 = 20,717.57 : x
  2. Step 2: Convert to fraction form
    58,676.40/87,991.56 = 20,717.57/x
  3. Step 3: Cross multiply
    58,676.40x = 87,991.56 × 20,717.57
  4. Step 4: Simplify right side
    58,676.40x = 1,822,971,303.71
  5. Step 5: Solve for x
    x = 1,822,971,303.71/58,676.40
  6. Step 6: Final answer
    x = 31,068.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.