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Finding the Fourth Proportional to 141,495.68, 195,268.16 and 81,072

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Solution

The fourth proportional to 141,495.68, 195,268.16 and 81,072 is: 111,881.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,495.68 : 195,268.16 = 81,072 : x
  2. Step 2: Convert to fraction form
    141,495.68/195,268.16 = 81,072/x
  3. Step 3: Cross multiply
    141,495.68x = 195,268.16 × 81,072
  4. Step 4: Simplify right side
    141,495.68x = 15,830,780,267.52
  5. Step 5: Solve for x
    x = 15,830,780,267.52/141,495.68
  6. Step 6: Final answer
    x = 111,881.72

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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.