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Finding the Fourth Proportional to 66,373.66, 91,506.09 and 64,309.78

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Solution

The fourth proportional to 66,373.66, 91,506.09 and 64,309.78 is: 88,660.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,373.66 : 91,506.09 = 64,309.78 : x
  2. Step 2: Convert to fraction form
    66,373.66/91,506.09 = 64,309.78/x
  3. Step 3: Cross multiply
    66,373.66x = 91,506.09 × 64,309.78
  4. Step 4: Simplify right side
    66,373.66x = 5,884,736,287.79
  5. Step 5: Solve for x
    x = 5,884,736,287.79/66,373.66
  6. Step 6: Final answer
    x = 88,660.72

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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.