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Finding the Fourth Proportional to 64,342.40, 96,520.80 and 19,968.80

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Solution

The fourth proportional to 64,342.40, 96,520.80 and 19,968.80 is: 29,955.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,342.40 : 96,520.80 = 19,968.80 : x
  2. Step 2: Convert to fraction form
    64,342.40/96,520.80 = 19,968.80/x
  3. Step 3: Cross multiply
    64,342.40x = 96,520.80 × 19,968.80
  4. Step 4: Simplify right side
    64,342.40x = 1,927,404,551.04
  5. Step 5: Solve for x
    x = 1,927,404,551.04/64,342.40
  6. Step 6: Final answer
    x = 29,955.43

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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.