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Finding the Fourth Proportional to 245,751.66, 339,148.08 and 138,328.56

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Solution

The fourth proportional to 245,751.66, 339,148.08 and 138,328.56 is: 190,899.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,751.66 : 339,148.08 = 138,328.56 : x
  2. Step 2: Convert to fraction form
    245,751.66/339,148.08 = 138,328.56/x
  3. Step 3: Cross multiply
    245,751.66x = 339,148.08 × 138,328.56
  4. Step 4: Simplify right side
    245,751.66x = 46,913,865,533.16
  5. Step 5: Solve for x
    x = 46,913,865,533.16/245,751.66
  6. Step 6: Final answer
    x = 190,899.49

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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.