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Finding the Fourth Proportional to 139,968,692.90, 210,058,015.35 and 71,776,283.30

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Solution

The fourth proportional to 139,968,692.90, 210,058,015.35 and 71,776,283.30 is: 107,718,256.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,692.90 : 210,058,015.35 = 71,776,283.30 : x
  2. Step 2: Convert to fraction form
    139,968,692.90/210,058,015.35 = 71,776,283.30/x
  3. Step 3: Cross multiply
    139,968,692.90x = 210,058,015.35 × 71,776,283.30
  4. Step 4: Simplify right side
    139,968,692.90x = 15,077,183,619,197,348
  5. Step 5: Solve for x
    x = 15,077,183,619,197,348/139,968,692.90
  6. Step 6: Final answer
    x = 107,718,256.90

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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.