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Finding the Fourth Proportional to 145,951.20, 218,910.60 and 40,780.80

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Solution

The fourth proportional to 145,951.20, 218,910.60 and 40,780.80 is: 61,166.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,951.20 : 218,910.60 = 40,780.80 : x
  2. Step 2: Convert to fraction form
    145,951.20/218,910.60 = 40,780.80/x
  3. Step 3: Cross multiply
    145,951.20x = 218,910.60 × 40,780.80
  4. Step 4: Simplify right side
    145,951.20x = 8,927,349,396.48
  5. Step 5: Solve for x
    x = 8,927,349,396.48/145,951.20
  6. Step 6: Final answer
    x = 61,166.67

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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.