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Finding the Fourth Proportional to 78,093.60, 107,740.17 and 51,251.01

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Solution

The fourth proportional to 78,093.60, 107,740.17 and 51,251.01 is: 70,707.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,093.60 : 107,740.17 = 51,251.01 : x
  2. Step 2: Convert to fraction form
    78,093.60/107,740.17 = 51,251.01/x
  3. Step 3: Cross multiply
    78,093.60x = 107,740.17 × 51,251.01
  4. Step 4: Simplify right side
    78,093.60x = 5,521,792,530.07
  5. Step 5: Solve for x
    x = 5,521,792,530.07/78,093.60
  6. Step 6: Final answer
    x = 70,707.36

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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.