Home / 85,128.05-117,472.89-48,803.45

Finding the Fourth Proportional to 85,128.05, 117,472.89 and 48,803.45

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Solution

The fourth proportional to 85,128.05, 117,472.89 and 48,803.45 is: 67,346.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,128.05 : 117,472.89 = 48,803.45 : x
  2. Step 2: Convert to fraction form
    85,128.05/117,472.89 = 48,803.45/x
  3. Step 3: Cross multiply
    85,128.05x = 117,472.89 × 48,803.45
  4. Step 4: Simplify right side
    85,128.05x = 5,733,082,313.47
  5. Step 5: Solve for x
    x = 5,733,082,313.47/85,128.05
  6. Step 6: Final answer
    x = 67,346.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.