Home / 129,296.72-178,226.16-118,449.20

Finding the Fourth Proportional to 129,296.72, 178,226.16 and 118,449.20

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Solution

The fourth proportional to 129,296.72, 178,226.16 and 118,449.20 is: 163,273.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,296.72 : 178,226.16 = 118,449.20 : x
  2. Step 2: Convert to fraction form
    129,296.72/178,226.16 = 118,449.20/x
  3. Step 3: Cross multiply
    129,296.72x = 178,226.16 × 118,449.20
  4. Step 4: Simplify right side
    129,296.72x = 21,110,746,071.07
  5. Step 5: Solve for x
    x = 21,110,746,071.07/129,296.72
  6. Step 6: Final answer
    x = 163,273.64

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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.