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Finding the Fourth Proportional to 72,474.80, 108,712.20 and 51,479.60

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Solution

The fourth proportional to 72,474.80, 108,712.20 and 51,479.60 is: 77,219.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,474.80 : 108,712.20 = 51,479.60 : x
  2. Step 2: Convert to fraction form
    72,474.80/108,712.20 = 51,479.60/x
  3. Step 3: Cross multiply
    72,474.80x = 108,712.20 × 51,479.60
  4. Step 4: Simplify right side
    72,474.80x = 5,596,460,571.12
  5. Step 5: Solve for x
    x = 5,596,460,571.12/72,474.80
  6. Step 6: Final answer
    x = 77,219.40

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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.