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Finding the Fourth Proportional to 245,663.16, 339,011.20 and 138,233.12

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Solution

The fourth proportional to 245,663.16, 339,011.20 and 138,233.12 is: 190,759.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,663.16 : 339,011.20 = 138,233.12 : x
  2. Step 2: Convert to fraction form
    245,663.16/339,011.20 = 138,233.12/x
  3. Step 3: Cross multiply
    245,663.16x = 339,011.20 × 138,233.12
  4. Step 4: Simplify right side
    245,663.16x = 46,862,575,890.94
  5. Step 5: Solve for x
    x = 46,862,575,890.94/245,663.16
  6. Step 6: Final answer
    x = 190,759.48

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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.