Home / 78,322.23-108,081.78-42,511.48

Finding the Fourth Proportional to 78,322.23, 108,081.78 and 42,511.48

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Solution

The fourth proportional to 78,322.23, 108,081.78 and 42,511.48 is: 58,664.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,322.23 : 108,081.78 = 42,511.48 : x
  2. Step 2: Convert to fraction form
    78,322.23/108,081.78 = 42,511.48/x
  3. Step 3: Cross multiply
    78,322.23x = 108,081.78 × 42,511.48
  4. Step 4: Simplify right side
    78,322.23x = 4,594,716,158.63
  5. Step 5: Solve for x
    x = 4,594,716,158.63/78,322.23
  6. Step 6: Final answer
    x = 58,664.27

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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.