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Finding the Fourth Proportional to 142,775.88, 197,107.11 and 91,144.91

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Solution

The fourth proportional to 142,775.88, 197,107.11 and 91,144.91 is: 125,828.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,775.88 : 197,107.11 = 91,144.91 : x
  2. Step 2: Convert to fraction form
    142,775.88/197,107.11 = 91,144.91/x
  3. Step 3: Cross multiply
    142,775.88x = 197,107.11 × 91,144.91
  4. Step 4: Simplify right side
    142,775.88x = 17,965,308,815.77
  5. Step 5: Solve for x
    x = 17,965,308,815.77/142,775.88
  6. Step 6: Final answer
    x = 125,828.74

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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.