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Finding the Fourth Proportional to 66,319.56, 91,405.65 and 57,768.39

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Solution

The fourth proportional to 66,319.56, 91,405.65 and 57,768.39 is: 79,619.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,319.56 : 91,405.65 = 57,768.39 : x
  2. Step 2: Convert to fraction form
    66,319.56/91,405.65 = 57,768.39/x
  3. Step 3: Cross multiply
    66,319.56x = 91,405.65 × 57,768.39
  4. Step 4: Simplify right side
    66,319.56x = 5,280,357,237.40
  5. Step 5: Solve for x
    x = 5,280,357,237.40/66,319.56
  6. Step 6: Final answer
    x = 79,619.91

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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.