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Finding the Fourth Proportional to 262,562.90, 393,953.70 and 85,124.30

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Solution

The fourth proportional to 262,562.90, 393,953.70 and 85,124.30 is: 127,721.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,562.90 : 393,953.70 = 85,124.30 : x
  2. Step 2: Convert to fraction form
    262,562.90/393,953.70 = 85,124.30/x
  3. Step 3: Cross multiply
    262,562.90x = 393,953.70 × 85,124.30
  4. Step 4: Simplify right side
    262,562.90x = 33,535,032,944.91
  5. Step 5: Solve for x
    x = 33,535,032,944.91/262,562.90
  6. Step 6: Final answer
    x = 127,721.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.