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Finding the Fourth Proportional to 60,453, 90,681.12 and 18,900

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Solution

The fourth proportional to 60,453, 90,681.12 and 18,900 is: 28,350.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,453 : 90,681.12 = 18,900 : x
  2. Step 2: Convert to fraction form
    60,453/90,681.12 = 18,900/x
  3. Step 3: Cross multiply
    60,453x = 90,681.12 × 18,900
  4. Step 4: Simplify right side
    60,453x = 1,713,873,168
  5. Step 5: Solve for x
    x = 1,713,873,168/60,453
  6. Step 6: Final answer
    x = 28,350.51

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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.