Home / 78,724.08-108,577.80-50,432.40

Finding the Fourth Proportional to 78,724.08, 108,577.80 and 50,432.40

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Solution

The fourth proportional to 78,724.08, 108,577.80 and 50,432.40 is: 69,557.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,724.08 : 108,577.80 = 50,432.40 : x
  2. Step 2: Convert to fraction form
    78,724.08/108,577.80 = 50,432.40/x
  3. Step 3: Cross multiply
    78,724.08x = 108,577.80 × 50,432.40
  4. Step 4: Simplify right side
    78,724.08x = 5,475,839,040.72
  5. Step 5: Solve for x
    x = 5,475,839,040.72/78,724.08
  6. Step 6: Final answer
    x = 69,557.36

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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.