Home / 209,621.61-289,280.43-114,128.28

Finding the Fourth Proportional to 209,621.61, 289,280.43 and 114,128.28

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Solution

The fourth proportional to 209,621.61, 289,280.43 and 114,128.28 is: 157,498.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,621.61 : 289,280.43 = 114,128.28 : x
  2. Step 2: Convert to fraction form
    209,621.61/289,280.43 = 114,128.28/x
  3. Step 3: Cross multiply
    209,621.61x = 289,280.43 × 114,128.28
  4. Step 4: Simplify right side
    209,621.61x = 33,015,077,913.56
  5. Step 5: Solve for x
    x = 33,015,077,913.56/209,621.61
  6. Step 6: Final answer
    x = 157,498.45

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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.