Home / 66,651.18-91,988.64-38,351.40

Finding the Fourth Proportional to 66,651.18, 91,988.64 and 38,351.40

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Solution

The fourth proportional to 66,651.18, 91,988.64 and 38,351.40 is: 52,930.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,651.18 : 91,988.64 = 38,351.40 : x
  2. Step 2: Convert to fraction form
    66,651.18/91,988.64 = 38,351.40/x
  3. Step 3: Cross multiply
    66,651.18x = 91,988.64 × 38,351.40
  4. Step 4: Simplify right side
    66,651.18x = 3,527,893,128.10
  5. Step 5: Solve for x
    x = 3,527,893,128.10/66,651.18
  6. Step 6: Final answer
    x = 52,930.69

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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.