Home / 66,495.12-91,765.08-39,639.84

Finding the Fourth Proportional to 66,495.12, 91,765.08 and 39,639.84

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Solution

The fourth proportional to 66,495.12, 91,765.08 and 39,639.84 is: 54,704.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,495.12 : 91,765.08 = 39,639.84 : x
  2. Step 2: Convert to fraction form
    66,495.12/91,765.08 = 39,639.84/x
  3. Step 3: Cross multiply
    66,495.12x = 91,765.08 × 39,639.84
  4. Step 4: Simplify right side
    66,495.12x = 3,637,553,088.79
  5. Step 5: Solve for x
    x = 3,637,553,088.79/66,495.12
  6. Step 6: Final answer
    x = 54,704.06

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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.