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Finding the Fourth Proportional to 245,420.70, 368,131.05 and 127,128.30

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Solution

The fourth proportional to 245,420.70, 368,131.05 and 127,128.30 is: 190,692.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,420.70 : 368,131.05 = 127,128.30 : x
  2. Step 2: Convert to fraction form
    245,420.70/368,131.05 = 127,128.30/x
  3. Step 3: Cross multiply
    245,420.70x = 368,131.05 × 127,128.30
  4. Step 4: Simplify right side
    245,420.70x = 46,799,874,563.72
  5. Step 5: Solve for x
    x = 46,799,874,563.72/245,420.70
  6. Step 6: Final answer
    x = 190,692.45

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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.