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Finding the Fourth Proportional to 75,419.40, 113,031.90 and 57,801.90

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Solution

The fourth proportional to 75,419.40, 113,031.90 and 57,801.90 is: 86,628.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,419.40 : 113,031.90 = 57,801.90 : x
  2. Step 2: Convert to fraction form
    75,419.40/113,031.90 = 57,801.90/x
  3. Step 3: Cross multiply
    75,419.40x = 113,031.90 × 57,801.90
  4. Step 4: Simplify right side
    75,419.40x = 6,533,458,580.61
  5. Step 5: Solve for x
    x = 6,533,458,580.61/75,419.40
  6. Step 6: Final answer
    x = 86,628.36

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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.