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Finding the Fourth Proportional to 141,776.69, 195,649.74 and 81,345.98

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Solution

The fourth proportional to 141,776.69, 195,649.74 and 81,345.98 is: 112,256.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,776.69 : 195,649.74 = 81,345.98 : x
  2. Step 2: Convert to fraction form
    141,776.69/195,649.74 = 81,345.98/x
  3. Step 3: Cross multiply
    141,776.69x = 195,649.74 × 81,345.98
  4. Step 4: Simplify right side
    141,776.69x = 15,915,319,837.05
  5. Step 5: Solve for x
    x = 15,915,319,837.05/141,776.69
  6. Step 6: Final answer
    x = 112,256.25

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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.