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Finding the Fourth Proportional to 60,987.76, 91,481.64 and 40,206.40

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Solution

The fourth proportional to 60,987.76, 91,481.64 and 40,206.40 is: 60,309.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,987.76 : 91,481.64 = 40,206.40 : x
  2. Step 2: Convert to fraction form
    60,987.76/91,481.64 = 40,206.40/x
  3. Step 3: Cross multiply
    60,987.76x = 91,481.64 × 40,206.40
  4. Step 4: Simplify right side
    60,987.76x = 3,678,147,410.50
  5. Step 5: Solve for x
    x = 3,678,147,410.50/60,987.76
  6. Step 6: Final answer
    x = 60,309.60

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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.