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Finding the Fourth Proportional to 65,334.80, 90,077.36 and 42,323.68

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Solution

The fourth proportional to 65,334.80, 90,077.36 and 42,323.68 is: 58,351.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,334.80 : 90,077.36 = 42,323.68 : x
  2. Step 2: Convert to fraction form
    65,334.80/90,077.36 = 42,323.68/x
  3. Step 3: Cross multiply
    65,334.80x = 90,077.36 × 42,323.68
  4. Step 4: Simplify right side
    65,334.80x = 3,812,405,359.88
  5. Step 5: Solve for x
    x = 3,812,405,359.88/65,334.80
  6. Step 6: Final answer
    x = 58,351.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.