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Finding the Fourth Proportional to 218,485.95, 301,555.27 and 137,859.15

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Solution

The fourth proportional to 218,485.95, 301,555.27 and 137,859.15 is: 190,273.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,485.95 : 301,555.27 = 137,859.15 : x
  2. Step 2: Convert to fraction form
    218,485.95/301,555.27 = 137,859.15/x
  3. Step 3: Cross multiply
    218,485.95x = 301,555.27 × 137,859.15
  4. Step 4: Simplify right side
    218,485.95x = 41,572,153,200.22
  5. Step 5: Solve for x
    x = 41,572,153,200.22/218,485.95
  6. Step 6: Final answer
    x = 190,273.81

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1.5x scale

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.