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Finding the Fourth Proportional to 61,775.68, 85,275.84 and 39,147.52

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Solution

The fourth proportional to 61,775.68, 85,275.84 and 39,147.52 is: 54,039.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,775.68 : 85,275.84 = 39,147.52 : x
  2. Step 2: Convert to fraction form
    61,775.68/85,275.84 = 39,147.52/x
  3. Step 3: Cross multiply
    61,775.68x = 85,275.84 × 39,147.52
  4. Step 4: Simplify right side
    61,775.68x = 3,338,337,651.92
  5. Step 5: Solve for x
    x = 3,338,337,651.92/61,775.68
  6. Step 6: Final answer
    x = 54,039.67

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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.