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Finding the Fourth Proportional to 147,907.40, 221,709.90 and 72,912.20

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Solution

The fourth proportional to 147,907.40, 221,709.90 and 72,912.20 is: 109,293.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,907.40 : 221,709.90 = 72,912.20 : x
  2. Step 2: Convert to fraction form
    147,907.40/221,709.90 = 72,912.20/x
  3. Step 3: Cross multiply
    147,907.40x = 221,709.90 × 72,912.20
  4. Step 4: Simplify right side
    147,907.40x = 16,165,356,570.78
  5. Step 5: Solve for x
    x = 16,165,356,570.78/147,907.40
  6. Step 6: Final answer
    x = 109,293.76

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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.