Home / 69,123.12-103,686.66-19,206.87

Finding the Fourth Proportional to 69,123.12, 103,686.66 and 19,206.87

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Solution

The fourth proportional to 69,123.12, 103,686.66 and 19,206.87 is: 28,810.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,123.12 : 103,686.66 = 19,206.87 : x
  2. Step 2: Convert to fraction form
    69,123.12/103,686.66 = 19,206.87/x
  3. Step 3: Cross multiply
    69,123.12x = 103,686.66 × 19,206.87
  4. Step 4: Simplify right side
    69,123.12x = 1,991,496,199.35
  5. Step 5: Solve for x
    x = 1,991,496,199.35/69,123.12
  6. Step 6: Final answer
    x = 28,810.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.