Home / 218,973.80-328,436.40-61,218.20

Finding the Fourth Proportional to 218,973.80, 328,436.40 and 61,218.20

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Solution

The fourth proportional to 218,973.80, 328,436.40 and 61,218.20 is: 91,820.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,973.80 : 328,436.40 = 61,218.20 : x
  2. Step 2: Convert to fraction form
    218,973.80/328,436.40 = 61,218.20/x
  3. Step 3: Cross multiply
    218,973.80x = 328,436.40 × 61,218.20
  4. Step 4: Simplify right side
    218,973.80x = 20,106,285,222.48
  5. Step 5: Solve for x
    x = 20,106,285,222.48/218,973.80
  6. Step 6: Final answer
    x = 91,820.51

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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.