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Finding the Fourth Proportional to 74,800.94, 112,168.55 and 28,021.01

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Solution

The fourth proportional to 74,800.94, 112,168.55 and 28,021.01 is: 42,019.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,800.94 : 112,168.55 = 28,021.01 : x
  2. Step 2: Convert to fraction form
    74,800.94/112,168.55 = 28,021.01/x
  3. Step 3: Cross multiply
    74,800.94x = 112,168.55 × 28,021.01
  4. Step 4: Simplify right side
    74,800.94x = 3,143,075,360.29
  5. Step 5: Solve for x
    x = 3,143,075,360.29/74,800.94
  6. Step 6: Final answer
    x = 42,019.20

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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.