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Finding the Fourth Proportional to 58,470, 87,661.20 and 19,003.56

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Solution

The fourth proportional to 58,470, 87,661.20 and 19,003.56 is: 28,491.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,470 : 87,661.20 = 19,003.56 : x
  2. Step 2: Convert to fraction form
    58,470/87,661.20 = 19,003.56/x
  3. Step 3: Cross multiply
    58,470x = 87,661.20 × 19,003.56
  4. Step 4: Simplify right side
    58,470x = 1,665,874,873.87
  5. Step 5: Solve for x
    x = 1,665,874,873.87/58,470
  6. Step 6: Final answer
    x = 28,491.10

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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.