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Finding the Fourth Proportional to 81,503.80, 122,255.70 and 34,761.40

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Solution

The fourth proportional to 81,503.80, 122,255.70 and 34,761.40 is: 52,142.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,503.80 : 122,255.70 = 34,761.40 : x
  2. Step 2: Convert to fraction form
    81,503.80/122,255.70 = 34,761.40/x
  3. Step 3: Cross multiply
    81,503.80x = 122,255.70 × 34,761.40
  4. Step 4: Simplify right side
    81,503.80x = 4,249,779,289.98
  5. Step 5: Solve for x
    x = 4,249,779,289.98/81,503.80
  6. Step 6: Final answer
    x = 52,142.10

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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.