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Finding the Fourth Proportional to 245,878.26, 339,308.76 and 138,458.89

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Solution

The fourth proportional to 245,878.26, 339,308.76 and 138,458.89 is: 191,071.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,878.26 : 339,308.76 = 138,458.89 : x
  2. Step 2: Convert to fraction form
    245,878.26/339,308.76 = 138,458.89/x
  3. Step 3: Cross multiply
    245,878.26x = 339,308.76 × 138,458.89
  4. Step 4: Simplify right side
    245,878.26x = 46,980,314,276.88
  5. Step 5: Solve for x
    x = 46,980,314,276.88/245,878.26
  6. Step 6: Final answer
    x = 191,071.44

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1.5x scale

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.