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Finding the Fourth Proportional to 66,440.80, 91,685 and 37,756.72

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Solution

The fourth proportional to 66,440.80, 91,685 and 37,756.72 is: 52,102.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,440.80 : 91,685 = 37,756.72 : x
  2. Step 2: Convert to fraction form
    66,440.80/91,685 = 37,756.72/x
  3. Step 3: Cross multiply
    66,440.80x = 91,685 × 37,756.72
  4. Step 4: Simplify right side
    66,440.80x = 3,461,724,873.20
  5. Step 5: Solve for x
    x = 3,461,724,873.20/66,440.80
  6. Step 6: Final answer
    x = 52,102.40

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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.