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Finding the Fourth Proportional to 72,646.39, 100,251.64 and 40,815.01

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Solution

The fourth proportional to 72,646.39, 100,251.64 and 40,815.01 is: 56,324.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,646.39 : 100,251.64 = 40,815.01 : x
  2. Step 2: Convert to fraction form
    72,646.39/100,251.64 = 40,815.01/x
  3. Step 3: Cross multiply
    72,646.39x = 100,251.64 × 40,815.01
  4. Step 4: Simplify right side
    72,646.39x = 4,091,771,689.12
  5. Step 5: Solve for x
    x = 4,091,771,689.12/72,646.39
  6. Step 6: Final answer
    x = 56,324.50

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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.