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Finding the Fourth Proportional to 39,878, 59,810.48 and 28,155.68

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Solution

The fourth proportional to 39,878, 59,810.48 and 28,155.68 is: 42,228.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,878 : 59,810.48 = 28,155.68 : x
  2. Step 2: Convert to fraction form
    39,878/59,810.48 = 28,155.68/x
  3. Step 3: Cross multiply
    39,878x = 59,810.48 × 28,155.68
  4. Step 4: Simplify right side
    39,878x = 1,684,004,735.53
  5. Step 5: Solve for x
    x = 1,684,004,735.53/39,878
  6. Step 6: Final answer
    x = 42,228.92

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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.