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Finding the Fourth Proportional to 75,619.20, 113,428.80 and 47,625.60

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Solution

The fourth proportional to 75,619.20, 113,428.80 and 47,625.60 is: 71,438.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,619.20 : 113,428.80 = 47,625.60 : x
  2. Step 2: Convert to fraction form
    75,619.20/113,428.80 = 47,625.60/x
  3. Step 3: Cross multiply
    75,619.20x = 113,428.80 × 47,625.60
  4. Step 4: Simplify right side
    75,619.20x = 5,402,114,657.28
  5. Step 5: Solve for x
    x = 5,402,114,657.28/75,619.20
  6. Step 6: Final answer
    x = 71,438.40

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1.5x scale

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.