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Finding the Fourth Proportional to 65,578.44, 90,539.46 and 45,427.86

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Solution

The fourth proportional to 65,578.44, 90,539.46 and 45,427.86 is: 62,719.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,578.44 : 90,539.46 = 45,427.86 : x
  2. Step 2: Convert to fraction form
    65,578.44/90,539.46 = 45,427.86/x
  3. Step 3: Cross multiply
    65,578.44x = 90,539.46 × 45,427.86
  4. Step 4: Simplify right side
    65,578.44x = 4,113,013,913.36
  5. Step 5: Solve for x
    x = 4,113,013,913.36/65,578.44
  6. Step 6: Final answer
    x = 62,719.00

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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.