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Finding the Fourth Proportional to 245,742.60, 339,135.66 and 138,319.56

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Solution

The fourth proportional to 245,742.60, 339,135.66 and 138,319.56 is: 190,887.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,742.60 : 339,135.66 = 138,319.56 : x
  2. Step 2: Convert to fraction form
    245,742.60/339,135.66 = 138,319.56/x
  3. Step 3: Cross multiply
    245,742.60x = 339,135.66 × 138,319.56
  4. Step 4: Simplify right side
    245,742.60x = 46,909,095,271.51
  5. Step 5: Solve for x
    x = 46,909,095,271.51/245,742.60
  6. Step 6: Final answer
    x = 190,887.11

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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.