Home / 78,643.35-108,631.69-58,266.81

Finding the Fourth Proportional to 78,643.35, 108,631.69 and 58,266.81

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Solution

The fourth proportional to 78,643.35, 108,631.69 and 58,266.81 is: 80,485.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,643.35 : 108,631.69 = 58,266.81 : x
  2. Step 2: Convert to fraction form
    78,643.35/108,631.69 = 58,266.81/x
  3. Step 3: Cross multiply
    78,643.35x = 108,631.69 × 58,266.81
  4. Step 4: Simplify right side
    78,643.35x = 6,329,621,895.54
  5. Step 5: Solve for x
    x = 6,329,621,895.54/78,643.35
  6. Step 6: Final answer
    x = 80,485.15

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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.