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Finding the Fourth Proportional to 77,947.20, 117,007.20 and 48,398.40

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Solution

The fourth proportional to 77,947.20, 117,007.20 and 48,398.40 is: 72,651.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,947.20 : 117,007.20 = 48,398.40 : x
  2. Step 2: Convert to fraction form
    77,947.20/117,007.20 = 48,398.40/x
  3. Step 3: Cross multiply
    77,947.20x = 117,007.20 × 48,398.40
  4. Step 4: Simplify right side
    77,947.20x = 5,662,961,268.48
  5. Step 5: Solve for x
    x = 5,662,961,268.48/77,947.20
  6. Step 6: Final answer
    x = 72,651.25

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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.