Home / 210,621.21-290,657.25-115,128.29

Finding the Fourth Proportional to 210,621.21, 290,657.25 and 115,128.29

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Solution

The fourth proportional to 210,621.21, 290,657.25 and 115,128.29 is: 158,877.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,621.21 : 290,657.25 = 115,128.29 : x
  2. Step 2: Convert to fraction form
    210,621.21/290,657.25 = 115,128.29/x
  3. Step 3: Cross multiply
    210,621.21x = 290,657.25 × 115,128.29
  4. Step 4: Simplify right side
    210,621.21x = 33,462,870,715.32
  5. Step 5: Solve for x
    x = 33,462,870,715.32/210,621.21
  6. Step 6: Final answer
    x = 158,877.02

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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.