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Finding the Fourth Proportional to 70,399.86, 105,599.94 and 17,091.64

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Solution

The fourth proportional to 70,399.86, 105,599.94 and 17,091.64 is: 25,637.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,399.86 : 105,599.94 = 17,091.64 : x
  2. Step 2: Convert to fraction form
    70,399.86/105,599.94 = 17,091.64/x
  3. Step 3: Cross multiply
    70,399.86x = 105,599.94 × 17,091.64
  4. Step 4: Simplify right side
    70,399.86x = 1,804,876,158.50
  5. Step 5: Solve for x
    x = 1,804,876,158.50/70,399.86
  6. Step 6: Final answer
    x = 25,637.50

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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.