Home / 105,645.40-145,789.82-57,898.64

Finding the Fourth Proportional to 105,645.40, 145,789.82 and 57,898.64

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Solution

The fourth proportional to 105,645.40, 145,789.82 and 57,898.64 is: 79,899.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,645.40 : 145,789.82 = 57,898.64 : x
  2. Step 2: Convert to fraction form
    105,645.40/145,789.82 = 57,898.64/x
  3. Step 3: Cross multiply
    105,645.40x = 145,789.82 × 57,898.64
  4. Step 4: Simplify right side
    105,645.40x = 8,441,031,285.40
  5. Step 5: Solve for x
    x = 8,441,031,285.40/105,645.40
  6. Step 6: Final answer
    x = 79,899.66

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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.