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Finding the Fourth Proportional to 145,636.19, 218,539.20 and 61,391.20

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Solution

The fourth proportional to 145,636.19, 218,539.20 and 61,391.20 is: 92,122.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,636.19 : 218,539.20 = 61,391.20 : x
  2. Step 2: Convert to fraction form
    145,636.19/218,539.20 = 61,391.20/x
  3. Step 3: Cross multiply
    145,636.19x = 218,539.20 × 61,391.20
  4. Step 4: Simplify right side
    145,636.19x = 13,416,383,735.04
  5. Step 5: Solve for x
    x = 13,416,383,735.04/145,636.19
  6. Step 6: Final answer
    x = 92,122.59

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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.