Home / 105,645.15-145,789.47-57,898.38

Finding the Fourth Proportional to 105,645.15, 145,789.47 and 57,898.38

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Solution

The fourth proportional to 105,645.15, 145,789.47 and 57,898.38 is: 79,899.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,645.15 : 145,789.47 = 57,898.38 : x
  2. Step 2: Convert to fraction form
    105,645.15/145,789.47 = 57,898.38/x
  3. Step 3: Cross multiply
    105,645.15x = 145,789.47 × 57,898.38
  4. Step 4: Simplify right side
    105,645.15x = 8,440,974,680.77
  5. Step 5: Solve for x
    x = 8,440,974,680.77/105,645.15
  6. Step 6: Final answer
    x = 79,899.31

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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.