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Finding the Fourth Proportional to 72,800.76, 100,456.80 and 40,968.84

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Solution

The fourth proportional to 72,800.76, 100,456.80 and 40,968.84 is: 56,532.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,800.76 : 100,456.80 = 40,968.84 : x
  2. Step 2: Convert to fraction form
    72,800.76/100,456.80 = 40,968.84/x
  3. Step 3: Cross multiply
    72,800.76x = 100,456.80 × 40,968.84
  4. Step 4: Simplify right side
    72,800.76x = 4,115,598,566.11
  5. Step 5: Solve for x
    x = 4,115,598,566.11/72,800.76
  6. Step 6: Final answer
    x = 56,532.36

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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.