Home / 85,438.98-128,085.78-52,182.38

Finding the Fourth Proportional to 85,438.98, 128,085.78 and 52,182.38

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Solution

The fourth proportional to 85,438.98, 128,085.78 and 52,182.38 is: 78,229.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,438.98 : 128,085.78 = 52,182.38 : x
  2. Step 2: Convert to fraction form
    85,438.98/128,085.78 = 52,182.38/x
  3. Step 3: Cross multiply
    85,438.98x = 128,085.78 × 52,182.38
  4. Step 4: Simplify right side
    85,438.98x = 6,683,819,943.22
  5. Step 5: Solve for x
    x = 6,683,819,943.22/85,438.98
  6. Step 6: Final answer
    x = 78,229.16

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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.