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Finding the Fourth Proportional to 64,406.40, 96,616.80 and 20,032.80

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Solution

The fourth proportional to 64,406.40, 96,616.80 and 20,032.80 is: 30,051.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,406.40 : 96,616.80 = 20,032.80 : x
  2. Step 2: Convert to fraction form
    64,406.40/96,616.80 = 20,032.80/x
  3. Step 3: Cross multiply
    64,406.40x = 96,616.80 × 20,032.80
  4. Step 4: Simplify right side
    64,406.40x = 1,935,505,031.04
  5. Step 5: Solve for x
    x = 1,935,505,031.04/64,406.40
  6. Step 6: Final answer
    x = 30,051.44

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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.