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Finding the Fourth Proportional to 245,130.53, 338,243.28 and 137,679.98

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Solution

The fourth proportional to 245,130.53, 338,243.28 and 137,679.98 is: 189,977.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,130.53 : 338,243.28 = 137,679.98 : x
  2. Step 2: Convert to fraction form
    245,130.53/338,243.28 = 137,679.98/x
  3. Step 3: Cross multiply
    245,130.53x = 338,243.28 × 137,679.98
  4. Step 4: Simplify right side
    245,130.53x = 46,569,326,334.32
  5. Step 5: Solve for x
    x = 46,569,326,334.32/245,130.53
  6. Step 6: Final answer
    x = 189,977.67

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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.