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Finding the Fourth Proportional to 66,021.52, 91,018.56 and 63,953.68

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Solution

The fourth proportional to 66,021.52, 91,018.56 and 63,953.68 is: 88,167.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,021.52 : 91,018.56 = 63,953.68 : x
  2. Step 2: Convert to fraction form
    66,021.52/91,018.56 = 63,953.68/x
  3. Step 3: Cross multiply
    66,021.52x = 91,018.56 × 63,953.68
  4. Step 4: Simplify right side
    66,021.52x = 5,820,971,860.30
  5. Step 5: Solve for x
    x = 5,820,971,860.30/66,021.52
  6. Step 6: Final answer
    x = 88,167.80

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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.