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Finding the Fourth Proportional to 145,891.67, 201,326.50 and 81,362.87

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Solution

The fourth proportional to 145,891.67, 201,326.50 and 81,362.87 is: 112,278.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,891.67 : 201,326.50 = 81,362.87 : x
  2. Step 2: Convert to fraction form
    145,891.67/201,326.50 = 81,362.87/x
  3. Step 3: Cross multiply
    145,891.67x = 201,326.50 × 81,362.87
  4. Step 4: Simplify right side
    145,891.67x = 16,380,501,805.67
  5. Step 5: Solve for x
    x = 16,380,501,805.67/145,891.67
  6. Step 6: Final answer
    x = 112,278.52

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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.