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Finding the Fourth Proportional to 139,471.68, 209,235.36 and 72,941.76

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Solution

The fourth proportional to 139,471.68, 209,235.36 and 72,941.76 is: 109,427.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,471.68 : 209,235.36 = 72,941.76 : x
  2. Step 2: Convert to fraction form
    139,471.68/209,235.36 = 72,941.76/x
  3. Step 3: Cross multiply
    139,471.68x = 209,235.36 × 72,941.76
  4. Step 4: Simplify right side
    139,471.68x = 15,261,995,412.63
  5. Step 5: Solve for x
    x = 15,261,995,412.63/139,471.68
  6. Step 6: Final answer
    x = 109,427.20

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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.