Home / 86,789.95-130,138.13-39,379.19

Finding the Fourth Proportional to 86,789.95, 130,138.13 and 39,379.19

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Solution

The fourth proportional to 86,789.95, 130,138.13 and 39,379.19 is: 59,047.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,789.95 : 130,138.13 = 39,379.19 : x
  2. Step 2: Convert to fraction form
    86,789.95/130,138.13 = 39,379.19/x
  3. Step 3: Cross multiply
    86,789.95x = 130,138.13 × 39,379.19
  4. Step 4: Simplify right side
    86,789.95x = 5,124,733,595.27
  5. Step 5: Solve for x
    x = 5,124,733,595.27/86,789.95
  6. Step 6: Final answer
    x = 59,047.55

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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.