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Finding the Fourth Proportional to 141,535.67, 195,323.90 and 81,117.90

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Solution

The fourth proportional to 141,535.67, 195,323.90 and 81,117.90 is: 111,945.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,535.67 : 195,323.90 = 81,117.90 : x
  2. Step 2: Convert to fraction form
    141,535.67/195,323.90 = 81,117.90/x
  3. Step 3: Cross multiply
    141,535.67x = 195,323.90 × 81,117.90
  4. Step 4: Simplify right side
    141,535.67x = 15,844,264,587.81
  5. Step 5: Solve for x
    x = 15,844,264,587.81/141,535.67
  6. Step 6: Final answer
    x = 111,945.38

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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.