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Finding the Fourth Proportional to 65,646.56, 90,364.20 and 57,248.48

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Solution

The fourth proportional to 65,646.56, 90,364.20 and 57,248.48 is: 78,804.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,646.56 : 90,364.20 = 57,248.48 : x
  2. Step 2: Convert to fraction form
    65,646.56/90,364.20 = 57,248.48/x
  3. Step 3: Cross multiply
    65,646.56x = 90,364.20 × 57,248.48
  4. Step 4: Simplify right side
    65,646.56x = 5,173,213,096.42
  5. Step 5: Solve for x
    x = 5,173,213,096.42/65,646.56
  6. Step 6: Final answer
    x = 78,804.02

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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.