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Finding the Fourth Proportional to 72,807.76, 100,454.60 and 40,974.80

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Solution

The fourth proportional to 72,807.76, 100,454.60 and 40,974.80 is: 56,533.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,807.76 : 100,454.60 = 40,974.80 : x
  2. Step 2: Convert to fraction form
    72,807.76/100,454.60 = 40,974.80/x
  3. Step 3: Cross multiply
    72,807.76x = 100,454.60 × 40,974.80
  4. Step 4: Simplify right side
    72,807.76x = 4,116,107,144.08
  5. Step 5: Solve for x
    x = 4,116,107,144.08/72,807.76
  6. Step 6: Final answer
    x = 56,533.91

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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.