Home / 71,123.10-98,149.14-39,289.92

Finding the Fourth Proportional to 71,123.10, 98,149.14 and 39,289.92

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Solution

The fourth proportional to 71,123.10, 98,149.14 and 39,289.92 is: 54,219.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,123.10 : 98,149.14 = 39,289.92 : x
  2. Step 2: Convert to fraction form
    71,123.10/98,149.14 = 39,289.92/x
  3. Step 3: Cross multiply
    71,123.10x = 98,149.14 × 39,289.92
  4. Step 4: Simplify right side
    71,123.10x = 3,856,271,858.67
  5. Step 5: Solve for x
    x = 3,856,271,858.67/71,123.10
  6. Step 6: Final answer
    x = 54,219.68

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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.