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Finding the Fourth Proportional to 66,297.36, 91,501.72 and 42,422.88

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Solution

The fourth proportional to 66,297.36, 91,501.72 and 42,422.88 is: 58,550.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,297.36 : 91,501.72 = 42,422.88 : x
  2. Step 2: Convert to fraction form
    66,297.36/91,501.72 = 42,422.88/x
  3. Step 3: Cross multiply
    66,297.36x = 91,501.72 × 42,422.88
  4. Step 4: Simplify right side
    66,297.36x = 3,881,766,487.35
  5. Step 5: Solve for x
    x = 3,881,766,487.35/66,297.36
  6. Step 6: Final answer
    x = 58,550.85

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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.