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Finding the Fourth Proportional to 165,419.40, 248,057.10 and 76,643.40

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Solution

The fourth proportional to 165,419.40, 248,057.10 and 76,643.40 is: 114,931.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,419.40 : 248,057.10 = 76,643.40 : x
  2. Step 2: Convert to fraction form
    165,419.40/248,057.10 = 76,643.40/x
  3. Step 3: Cross multiply
    165,419.40x = 248,057.10 × 76,643.40
  4. Step 4: Simplify right side
    165,419.40x = 19,011,939,538.14
  5. Step 5: Solve for x
    x = 19,011,939,538.14/165,419.40
  6. Step 6: Final answer
    x = 114,931.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.