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Finding the Fourth Proportional to 79,620.56, 109,881.02 and 45,639.57

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Solution

The fourth proportional to 79,620.56, 109,881.02 and 45,639.57 is: 62,985.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,620.56 : 109,881.02 = 45,639.57 : x
  2. Step 2: Convert to fraction form
    79,620.56/109,881.02 = 45,639.57/x
  3. Step 3: Cross multiply
    79,620.56x = 109,881.02 × 45,639.57
  4. Step 4: Simplify right side
    79,620.56x = 5,014,922,503.96
  5. Step 5: Solve for x
    x = 5,014,922,503.96/79,620.56
  6. Step 6: Final answer
    x = 62,985.27

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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.