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Finding the Fourth Proportional to 202,139.40, 302,881.05 and 127,125.30

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Solution

The fourth proportional to 202,139.40, 302,881.05 and 127,125.30 is: 190,481.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,139.40 : 302,881.05 = 127,125.30 : x
  2. Step 2: Convert to fraction form
    202,139.40/302,881.05 = 127,125.30/x
  3. Step 3: Cross multiply
    202,139.40x = 302,881.05 × 127,125.30
  4. Step 4: Simplify right side
    202,139.40x = 38,503,844,345.57
  5. Step 5: Solve for x
    x = 38,503,844,345.57/202,139.40
  6. Step 6: Final answer
    x = 190,481.64

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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.