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Finding the Fourth Proportional to 202,153.90, 302,902.80 and 127,139.80

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Solution

The fourth proportional to 202,153.90, 302,902.80 and 127,139.80 is: 190,503.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,153.90 : 302,902.80 = 127,139.80 : x
  2. Step 2: Convert to fraction form
    202,153.90/302,902.80 = 127,139.80/x
  3. Step 3: Cross multiply
    202,153.90x = 302,902.80 × 127,139.80
  4. Step 4: Simplify right side
    202,153.90x = 38,511,001,411.44
  5. Step 5: Solve for x
    x = 38,511,001,411.44/202,153.90
  6. Step 6: Final answer
    x = 190,503.38

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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.