Home / 78,724.56-108,642.10-48,102.64

Finding the Fourth Proportional to 78,724.56, 108,642.10 and 48,102.64

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Solution

The fourth proportional to 78,724.56, 108,642.10 and 48,102.64 is: 66,382.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,724.56 : 108,642.10 = 48,102.64 : x
  2. Step 2: Convert to fraction form
    78,724.56/108,642.10 = 48,102.64/x
  3. Step 3: Cross multiply
    78,724.56x = 108,642.10 × 48,102.64
  4. Step 4: Simplify right side
    78,724.56x = 5,225,971,825.14
  5. Step 5: Solve for x
    x = 5,225,971,825.14/78,724.56
  6. Step 6: Final answer
    x = 66,382.99

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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.