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Finding the Fourth Proportional to 139,871.20, 210,325.20 and 117,061.60

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Solution

The fourth proportional to 139,871.20, 210,325.20 and 117,061.60 is: 176,026.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,871.20 : 210,325.20 = 117,061.60 : x
  2. Step 2: Convert to fraction form
    139,871.20/210,325.20 = 117,061.60/x
  3. Step 3: Cross multiply
    139,871.20x = 210,325.20 × 117,061.60
  4. Step 4: Simplify right side
    139,871.20x = 24,621,004,432.32
  5. Step 5: Solve for x
    x = 24,621,004,432.32/139,871.20
  6. Step 6: Final answer
    x = 176,026.26

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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.