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Finding the Fourth Proportional to 66,491.90, 91,746.27 and 39,636.92

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Solution

The fourth proportional to 66,491.90, 91,746.27 and 39,636.92 is: 54,691.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,491.90 : 91,746.27 = 39,636.92 : x
  2. Step 2: Convert to fraction form
    66,491.90/91,746.27 = 39,636.92/x
  3. Step 3: Cross multiply
    66,491.90x = 91,746.27 × 39,636.92
  4. Step 4: Simplify right side
    66,491.90x = 3,636,539,564.29
  5. Step 5: Solve for x
    x = 3,636,539,564.29/66,491.90
  6. Step 6: Final answer
    x = 54,691.47

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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.