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Finding the Fourth Proportional to 64,695.80, 96,986.10 and 57,697.40

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Solution

The fourth proportional to 64,695.80, 96,986.10 and 57,697.40 is: 86,494.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,695.80 : 96,986.10 = 57,697.40 : x
  2. Step 2: Convert to fraction form
    64,695.80/96,986.10 = 57,697.40/x
  3. Step 3: Cross multiply
    64,695.80x = 96,986.10 × 57,697.40
  4. Step 4: Simplify right side
    64,695.80x = 5,595,845,806.14
  5. Step 5: Solve for x
    x = 5,595,845,806.14/64,695.80
  6. Step 6: Final answer
    x = 86,494.73

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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.