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Finding the Fourth Proportional to 58,361.40, 87,555.96 and 18,918.54

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Solution

The fourth proportional to 58,361.40, 87,555.96 and 18,918.54 is: 28,382.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,361.40 : 87,555.96 = 18,918.54 : x
  2. Step 2: Convert to fraction form
    58,361.40/87,555.96 = 18,918.54/x
  3. Step 3: Cross multiply
    58,361.40x = 87,555.96 × 18,918.54
  4. Step 4: Simplify right side
    58,361.40x = 1,656,430,931.50
  5. Step 5: Solve for x
    x = 1,656,430,931.50/58,361.40
  6. Step 6: Final answer
    x = 28,382.30

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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.