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Finding the Fourth Proportional to 81,872.64, 112,985.28 and 46,062.72

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Solution

The fourth proportional to 81,872.64, 112,985.28 and 46,062.72 is: 63,567.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,872.64 : 112,985.28 = 46,062.72 : x
  2. Step 2: Convert to fraction form
    81,872.64/112,985.28 = 46,062.72/x
  3. Step 3: Cross multiply
    81,872.64x = 112,985.28 × 46,062.72
  4. Step 4: Simplify right side
    81,872.64x = 5,204,409,316.76
  5. Step 5: Solve for x
    x = 5,204,409,316.76/81,872.64
  6. Step 6: Final answer
    x = 63,567.14

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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.