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Finding the Fourth Proportional to 66,386.66, 91,614 and 39,530.30

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Solution

The fourth proportional to 66,386.66, 91,614 and 39,530.30 is: 54,552.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,386.66 : 91,614 = 39,530.30 : x
  2. Step 2: Convert to fraction form
    66,386.66/91,614 = 39,530.30/x
  3. Step 3: Cross multiply
    66,386.66x = 91,614 × 39,530.30
  4. Step 4: Simplify right side
    66,386.66x = 3,621,528,904.20
  5. Step 5: Solve for x
    x = 3,621,528,904.20/66,386.66
  6. Step 6: Final answer
    x = 54,552.06

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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.