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Finding the Fourth Proportional to 75,328.80, 113,090.40 and 60,554.40

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Solution

The fourth proportional to 75,328.80, 113,090.40 and 60,554.40 is: 90,909.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,328.80 : 113,090.40 = 60,554.40 : x
  2. Step 2: Convert to fraction form
    75,328.80/113,090.40 = 60,554.40/x
  3. Step 3: Cross multiply
    75,328.80x = 113,090.40 × 60,554.40
  4. Step 4: Simplify right side
    75,328.80x = 6,848,121,317.76
  5. Step 5: Solve for x
    x = 6,848,121,317.76/75,328.80
  6. Step 6: Final answer
    x = 90,909.74

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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.