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Finding the Fourth Proportional to 334,705.60, 502,055.20 and 81,987.20

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Solution

The fourth proportional to 334,705.60, 502,055.20 and 81,987.20 is: 122,980.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    334,705.60 : 502,055.20 = 81,987.20 : x
  2. Step 2: Convert to fraction form
    334,705.60/502,055.20 = 81,987.20/x
  3. Step 3: Cross multiply
    334,705.60x = 502,055.20 × 81,987.20
  4. Step 4: Simplify right side
    334,705.60x = 41,162,100,093.44
  5. Step 5: Solve for x
    x = 41,162,100,093.44/334,705.60
  6. Step 6: Final answer
    x = 122,980.02

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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.