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Finding the Fourth Proportional to 210,561.60, 290,579.22 and 115,072.32

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Solution

The fourth proportional to 210,561.60, 290,579.22 and 115,072.32 is: 158,802.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,561.60 : 290,579.22 = 115,072.32 : x
  2. Step 2: Convert to fraction form
    210,561.60/290,579.22 = 115,072.32/x
  3. Step 3: Cross multiply
    210,561.60x = 290,579.22 × 115,072.32
  4. Step 4: Simplify right side
    210,561.60x = 33,437,624,989.19
  5. Step 5: Solve for x
    x = 33,437,624,989.19/210,561.60
  6. Step 6: Final answer
    x = 158,802.10

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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.