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Finding the Fourth Proportional to 72,783.73, 100,443.51 and 40,953.76

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Solution

The fourth proportional to 72,783.73, 100,443.51 and 40,953.76 is: 56,517.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,783.73 : 100,443.51 = 40,953.76 : x
  2. Step 2: Convert to fraction form
    72,783.73/100,443.51 = 40,953.76/x
  3. Step 3: Cross multiply
    72,783.73x = 100,443.51 × 40,953.76
  4. Step 4: Simplify right side
    72,783.73x = 4,113,539,402.10
  5. Step 5: Solve for x
    x = 4,113,539,402.10/72,783.73
  6. Step 6: Final answer
    x = 56,517.29

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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.