Home / 78,724.08-117,980.40-43,131.87

Finding the Fourth Proportional to 78,724.08, 117,980.40 and 43,131.87

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Solution

The fourth proportional to 78,724.08, 117,980.40 and 43,131.87 is: 64,639.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,724.08 : 117,980.40 = 43,131.87 : x
  2. Step 2: Convert to fraction form
    78,724.08/117,980.40 = 43,131.87/x
  3. Step 3: Cross multiply
    78,724.08x = 117,980.40 × 43,131.87
  4. Step 4: Simplify right side
    78,724.08x = 5,088,715,275.35
  5. Step 5: Solve for x
    x = 5,088,715,275.35/78,724.08
  6. Step 6: Final answer
    x = 64,639.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.