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Finding the Fourth Proportional to 78,707.06, 118,062.03 and 28,787.12

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Solution

The fourth proportional to 78,707.06, 118,062.03 and 28,787.12 is: 43,181.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,707.06 : 118,062.03 = 28,787.12 : x
  2. Step 2: Convert to fraction form
    78,707.06/118,062.03 = 28,787.12/x
  3. Step 3: Cross multiply
    78,707.06x = 118,062.03 × 28,787.12
  4. Step 4: Simplify right side
    78,707.06x = 3,398,665,825.05
  5. Step 5: Solve for x
    x = 3,398,665,825.05/78,707.06
  6. Step 6: Final answer
    x = 43,181.21

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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.