Home / 103,123.13-142,315.52-57,815.64

Finding the Fourth Proportional to 103,123.13, 142,315.52 and 57,815.64

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Solution

The fourth proportional to 103,123.13, 142,315.52 and 57,815.64 is: 79,788.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,123.13 : 142,315.52 = 57,815.64 : x
  2. Step 2: Convert to fraction form
    103,123.13/142,315.52 = 57,815.64/x
  3. Step 3: Cross multiply
    103,123.13x = 142,315.52 × 57,815.64
  4. Step 4: Simplify right side
    103,123.13x = 8,228,062,581.65
  5. Step 5: Solve for x
    x = 8,228,062,581.65/103,123.13
  6. Step 6: Final answer
    x = 79,788.72

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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.