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Finding the Fourth Proportional to 64,659.40, 96,770.40 and 56,786.20

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Solution

The fourth proportional to 64,659.40, 96,770.40 and 56,786.20 is: 84,987.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,659.40 : 96,770.40 = 56,786.20 : x
  2. Step 2: Convert to fraction form
    64,659.40/96,770.40 = 56,786.20/x
  3. Step 3: Cross multiply
    64,659.40x = 96,770.40 × 56,786.20
  4. Step 4: Simplify right side
    64,659.40x = 5,495,223,288.48
  5. Step 5: Solve for x
    x = 5,495,223,288.48/64,659.40
  6. Step 6: Final answer
    x = 84,987.23

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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.