Home / 218,973.78-328,804.38-130,621.32

Finding the Fourth Proportional to 218,973.78, 328,804.38 and 130,621.32

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Solution

The fourth proportional to 218,973.78, 328,804.38 and 130,621.32 is: 196,137.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,973.78 : 328,804.38 = 130,621.32 : x
  2. Step 2: Convert to fraction form
    218,973.78/328,804.38 = 130,621.32/x
  3. Step 3: Cross multiply
    218,973.78x = 328,804.38 × 130,621.32
  4. Step 4: Simplify right side
    218,973.78x = 42,948,862,137.38
  5. Step 5: Solve for x
    x = 42,948,862,137.38/218,973.78
  6. Step 6: Final answer
    x = 196,137.01

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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.