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Finding the Fourth Proportional to 28,068.30, 42,102.08 and 8,078.28

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Solution

The fourth proportional to 28,068.30, 42,102.08 and 8,078.28 is: 12,117.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,068.30 : 42,102.08 = 8,078.28 : x
  2. Step 2: Convert to fraction form
    28,068.30/42,102.08 = 8,078.28/x
  3. Step 3: Cross multiply
    28,068.30x = 42,102.08 × 8,078.28
  4. Step 4: Simplify right side
    28,068.30x = 340,112,390.82
  5. Step 5: Solve for x
    x = 340,112,390.82/28,068.30
  6. Step 6: Final answer
    x = 12,117.31

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1.5x scale

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.