Home / 77,148.18-115,629.80-39,725.91

Finding the Fourth Proportional to 77,148.18, 115,629.80 and 39,725.91

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Solution

The fourth proportional to 77,148.18, 115,629.80 and 39,725.91 is: 59,541.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,148.18 : 115,629.80 = 39,725.91 : x
  2. Step 2: Convert to fraction form
    77,148.18/115,629.80 = 39,725.91/x
  3. Step 3: Cross multiply
    77,148.18x = 115,629.80 × 39,725.91
  4. Step 4: Simplify right side
    77,148.18x = 4,593,498,829.49
  5. Step 5: Solve for x
    x = 4,593,498,829.49/77,148.18
  6. Step 6: Final answer
    x = 59,541.25

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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.