Home / 78,088.40-107,718-49,399.16

Finding the Fourth Proportional to 78,088.40, 107,718 and 49,399.16

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Solution

The fourth proportional to 78,088.40, 107,718 and 49,399.16 is: 68,143.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,088.40 : 107,718 = 49,399.16 : x
  2. Step 2: Convert to fraction form
    78,088.40/107,718 = 49,399.16/x
  3. Step 3: Cross multiply
    78,088.40x = 107,718 × 49,399.16
  4. Step 4: Simplify right side
    78,088.40x = 5,321,178,716.88
  5. Step 5: Solve for x
    x = 5,321,178,716.88/78,088.40
  6. Step 6: Final answer
    x = 68,143.01

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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.