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Finding the Fourth Proportional to 72,646.89, 100,252.32 and 40,815.51

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Solution

The fourth proportional to 72,646.89, 100,252.32 and 40,815.51 is: 56,325.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,646.89 : 100,252.32 = 40,815.51 : x
  2. Step 2: Convert to fraction form
    72,646.89/100,252.32 = 40,815.51/x
  3. Step 3: Cross multiply
    72,646.89x = 100,252.32 × 40,815.51
  4. Step 4: Simplify right side
    72,646.89x = 4,091,849,569.48
  5. Step 5: Solve for x
    x = 4,091,849,569.48/72,646.89
  6. Step 6: Final answer
    x = 56,325.19

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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.