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Finding the Fourth Proportional to 253,131.64, 349,322.26 and 138,417.72

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Solution

The fourth proportional to 253,131.64, 349,322.26 and 138,417.72 is: 191,016.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,131.64 : 349,322.26 = 138,417.72 : x
  2. Step 2: Convert to fraction form
    253,131.64/349,322.26 = 138,417.72/x
  3. Step 3: Cross multiply
    253,131.64x = 349,322.26 × 138,417.72
  4. Step 4: Simplify right side
    253,131.64x = 48,352,390,774.45
  5. Step 5: Solve for x
    x = 48,352,390,774.45/253,131.64
  6. Step 6: Final answer
    x = 191,016.78

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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.