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Finding the Fourth Proportional to 76,107.15, 105,015.60 and 47,792.79

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Solution

The fourth proportional to 76,107.15, 105,015.60 and 47,792.79 is: 65,946.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,107.15 : 105,015.60 = 47,792.79 : x
  2. Step 2: Convert to fraction form
    76,107.15/105,015.60 = 47,792.79/x
  3. Step 3: Cross multiply
    76,107.15x = 105,015.60 × 47,792.79
  4. Step 4: Simplify right side
    76,107.15x = 5,018,988,517.52
  5. Step 5: Solve for x
    x = 5,018,988,517.52/76,107.15
  6. Step 6: Final answer
    x = 65,946.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.