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Finding the Fourth Proportional to 60,533.87, 90,815.38 and 18,980.87

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Solution

The fourth proportional to 60,533.87, 90,815.38 and 18,980.87 is: 28,475.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,533.87 : 90,815.38 = 18,980.87 : x
  2. Step 2: Convert to fraction form
    60,533.87/90,815.38 = 18,980.87/x
  3. Step 3: Cross multiply
    60,533.87x = 90,815.38 × 18,980.87
  4. Step 4: Simplify right side
    60,533.87x = 1,723,754,420.25
  5. Step 5: Solve for x
    x = 1,723,754,420.25/60,533.87
  6. Step 6: Final answer
    x = 28,475.87

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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.