Home / 129,055.89-178,246.16-85,964.40

Finding the Fourth Proportional to 129,055.89, 178,246.16 and 85,964.40

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Solution

The fourth proportional to 129,055.89, 178,246.16 and 85,964.40 is: 118,730.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,055.89 : 178,246.16 = 85,964.40 : x
  2. Step 2: Convert to fraction form
    129,055.89/178,246.16 = 85,964.40/x
  3. Step 3: Cross multiply
    129,055.89x = 178,246.16 × 85,964.40
  4. Step 4: Simplify right side
    129,055.89x = 15,322,823,766.88
  5. Step 5: Solve for x
    x = 15,322,823,766.88/129,055.89
  6. Step 6: Final answer
    x = 118,730.14

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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.