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Finding the Fourth Proportional to 205,503.40, 308,060.70 and 121,328.20

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Solution

The fourth proportional to 205,503.40, 308,060.70 and 121,328.20 is: 181,877.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,503.40 : 308,060.70 = 121,328.20 : x
  2. Step 2: Convert to fraction form
    205,503.40/308,060.70 = 121,328.20/x
  3. Step 3: Cross multiply
    205,503.40x = 308,060.70 × 121,328.20
  4. Step 4: Simplify right side
    205,503.40x = 37,376,450,221.74
  5. Step 5: Solve for x
    x = 37,376,450,221.74/205,503.40
  6. Step 6: Final answer
    x = 181,877.53

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1.5x scale

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.