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Finding the Fourth Proportional to 147,728.40, 221,441.40 and 72,733.20

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Solution

The fourth proportional to 147,728.40, 221,441.40 and 72,733.20 is: 109,025.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,728.40 : 221,441.40 = 72,733.20 : x
  2. Step 2: Convert to fraction form
    147,728.40/221,441.40 = 72,733.20/x
  3. Step 3: Cross multiply
    147,728.40x = 221,441.40 × 72,733.20
  4. Step 4: Simplify right side
    147,728.40x = 16,106,141,634.48
  5. Step 5: Solve for x
    x = 16,106,141,634.48/147,728.40
  6. Step 6: Final answer
    x = 109,025.36

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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.