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Finding the Fourth Proportional to 145,955.38, 201,418.78 and 78,887.38

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Solution

The fourth proportional to 145,955.38, 201,418.78 and 78,887.38 is: 108,864.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,955.38 : 201,418.78 = 78,887.38 : x
  2. Step 2: Convert to fraction form
    145,955.38/201,418.78 = 78,887.38/x
  3. Step 3: Cross multiply
    145,955.38x = 201,418.78 × 78,887.38
  4. Step 4: Simplify right side
    145,955.38x = 15,889,399,837.00
  5. Step 5: Solve for x
    x = 15,889,399,837.00/145,955.38
  6. Step 6: Final answer
    x = 108,864.78

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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.