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Finding the Fourth Proportional to 72,708.84, 100,336.50 and 40,877.64

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Solution

The fourth proportional to 72,708.84, 100,336.50 and 40,877.64 is: 56,410.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,708.84 : 100,336.50 = 40,877.64 : x
  2. Step 2: Convert to fraction form
    72,708.84/100,336.50 = 40,877.64/x
  3. Step 3: Cross multiply
    72,708.84x = 100,336.50 × 40,877.64
  4. Step 4: Simplify right side
    72,708.84x = 4,101,519,325.86
  5. Step 5: Solve for x
    x = 4,101,519,325.86/72,708.84
  6. Step 6: Final answer
    x = 56,410.19

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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.