Home / 138,975.63-208,445.01-39,143.67

Finding the Fourth Proportional to 138,975.63, 208,445.01 and 39,143.67

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Solution

The fourth proportional to 138,975.63, 208,445.01 and 39,143.67 is: 58,710.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,975.63 : 208,445.01 = 39,143.67 : x
  2. Step 2: Convert to fraction form
    138,975.63/208,445.01 = 39,143.67/x
  3. Step 3: Cross multiply
    138,975.63x = 208,445.01 × 39,143.67
  4. Step 4: Simplify right side
    138,975.63x = 8,159,302,684.59
  5. Step 5: Solve for x
    x = 8,159,302,684.59/138,975.63
  6. Step 6: Final answer
    x = 58,710.31

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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.