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Finding the Fourth Proportional to 66,060.69, 91,163.50 and 39,225.25

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Solution

The fourth proportional to 66,060.69, 91,163.50 and 39,225.25 is: 54,130.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,060.69 : 91,163.50 = 39,225.25 : x
  2. Step 2: Convert to fraction form
    66,060.69/91,163.50 = 39,225.25/x
  3. Step 3: Cross multiply
    66,060.69x = 91,163.50 × 39,225.25
  4. Step 4: Simplify right side
    66,060.69x = 3,575,911,078.38
  5. Step 5: Solve for x
    x = 3,575,911,078.38/66,060.69
  6. Step 6: Final answer
    x = 54,130.70

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Double scale
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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.