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Finding the Fourth Proportional to 125,813.50, 173,627.40 and 72,108.88

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Solution

The fourth proportional to 125,813.50, 173,627.40 and 72,108.88 is: 99,512.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,813.50 : 173,627.40 = 72,108.88 : x
  2. Step 2: Convert to fraction form
    125,813.50/173,627.40 = 72,108.88/x
  3. Step 3: Cross multiply
    125,813.50x = 173,627.40 × 72,108.88
  4. Step 4: Simplify right side
    125,813.50x = 12,520,077,758.69
  5. Step 5: Solve for x
    x = 12,520,077,758.69/125,813.50
  6. Step 6: Final answer
    x = 99,512.99

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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.