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Finding the Fourth Proportional to 103,361.14, 142,834.17 and 88,045.54

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Solution

The fourth proportional to 103,361.14, 142,834.17 and 88,045.54 is: 121,669.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,361.14 : 142,834.17 = 88,045.54 : x
  2. Step 2: Convert to fraction form
    103,361.14/142,834.17 = 88,045.54/x
  3. Step 3: Cross multiply
    103,361.14x = 142,834.17 × 88,045.54
  4. Step 4: Simplify right side
    103,361.14x = 12,575,911,628.10
  5. Step 5: Solve for x
    x = 12,575,911,628.10/103,361.14
  6. Step 6: Final answer
    x = 121,669.63

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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.