Home / 210,621.71-290,657.94-115,128.79

Finding the Fourth Proportional to 210,621.71, 290,657.94 and 115,128.79

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Solution

The fourth proportional to 210,621.71, 290,657.94 and 115,128.79 is: 158,877.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,621.71 : 290,657.94 = 115,128.79 : x
  2. Step 2: Convert to fraction form
    210,621.71/290,657.94 = 115,128.79/x
  3. Step 3: Cross multiply
    210,621.71x = 290,657.94 × 115,128.79
  4. Step 4: Simplify right side
    210,621.71x = 33,463,095,482.80
  5. Step 5: Solve for x
    x = 33,463,095,482.80/210,621.71
  6. Step 6: Final answer
    x = 158,877.71

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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.