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Finding the Fourth Proportional to 60,739.20, 91,069.20 and 54,518.40

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Solution

The fourth proportional to 60,739.20, 91,069.20 and 54,518.40 is: 81,742.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,739.20 : 91,069.20 = 54,518.40 : x
  2. Step 2: Convert to fraction form
    60,739.20/91,069.20 = 54,518.40/x
  3. Step 3: Cross multiply
    60,739.20x = 91,069.20 × 54,518.40
  4. Step 4: Simplify right side
    60,739.20x = 4,964,947,073.28
  5. Step 5: Solve for x
    x = 4,964,947,073.28/60,739.20
  6. Step 6: Final answer
    x = 81,742.06

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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.