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Finding the Fourth Proportional to 245,128.60, 367,692.90 and 139,958.20

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Solution

The fourth proportional to 245,128.60, 367,692.90 and 139,958.20 is: 209,937.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,128.60 : 367,692.90 = 139,958.20 : x
  2. Step 2: Convert to fraction form
    245,128.60/367,692.90 = 139,958.20/x
  3. Step 3: Cross multiply
    245,128.60x = 367,692.90 × 139,958.20
  4. Step 4: Simplify right side
    245,128.60x = 51,461,636,436.78
  5. Step 5: Solve for x
    x = 51,461,636,436.78/245,128.60
  6. Step 6: Final answer
    x = 209,937.30

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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.