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Finding the Fourth Proportional to 58,490, 87,744.12 and 19,037.78

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Solution

The fourth proportional to 58,490, 87,744.12 and 19,037.78 is: 28,559.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,490 : 87,744.12 = 19,037.78 : x
  2. Step 2: Convert to fraction form
    58,490/87,744.12 = 19,037.78/x
  3. Step 3: Cross multiply
    58,490x = 87,744.12 × 19,037.78
  4. Step 4: Simplify right side
    58,490x = 1,670,453,252.85
  5. Step 5: Solve for x
    x = 1,670,453,252.85/58,490
  6. Step 6: Final answer
    x = 28,559.64

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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.