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Finding the Fourth Proportional to 64,015.20, 96,022.80 and 19,641.60

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Solution

The fourth proportional to 64,015.20, 96,022.80 and 19,641.60 is: 29,462.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,015.20 : 96,022.80 = 19,641.60 : x
  2. Step 2: Convert to fraction form
    64,015.20/96,022.80 = 19,641.60/x
  3. Step 3: Cross multiply
    64,015.20x = 96,022.80 × 19,641.60
  4. Step 4: Simplify right side
    64,015.20x = 1,886,041,428.48
  5. Step 5: Solve for x
    x = 1,886,041,428.48/64,015.20
  6. Step 6: Final answer
    x = 29,462.40

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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.