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Finding the Fourth Proportional to 66,315.60, 91,513.68 and 36,101.52

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Solution

The fourth proportional to 66,315.60, 91,513.68 and 36,101.52 is: 49,819.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,315.60 : 91,513.68 = 36,101.52 : x
  2. Step 2: Convert to fraction form
    66,315.60/91,513.68 = 36,101.52/x
  3. Step 3: Cross multiply
    66,315.60x = 91,513.68 × 36,101.52
  4. Step 4: Simplify right side
    66,315.60x = 3,303,782,948.79
  5. Step 5: Solve for x
    x = 3,303,782,948.79/66,315.60
  6. Step 6: Final answer
    x = 49,819.09

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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.