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Finding the Fourth Proportional to 72,574.02, 100,146.78 and 40,747.80

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Solution

The fourth proportional to 72,574.02, 100,146.78 and 40,747.80 is: 56,228.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,574.02 : 100,146.78 = 40,747.80 : x
  2. Step 2: Convert to fraction form
    72,574.02/100,146.78 = 40,747.80/x
  3. Step 3: Cross multiply
    72,574.02x = 100,146.78 × 40,747.80
  4. Step 4: Simplify right side
    72,574.02x = 4,080,760,962.08
  5. Step 5: Solve for x
    x = 4,080,760,962.08/72,574.02
  6. Step 6: Final answer
    x = 56,228.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.