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Finding the Fourth Proportional to 145,910.90, 218,866.35 and 40,729.70

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Solution

The fourth proportional to 145,910.90, 218,866.35 and 40,729.70 is: 61,094.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,910.90 : 218,866.35 = 40,729.70 : x
  2. Step 2: Convert to fraction form
    145,910.90/218,866.35 = 40,729.70/x
  3. Step 3: Cross multiply
    145,910.90x = 218,866.35 × 40,729.70
  4. Step 4: Simplify right side
    145,910.90x = 8,914,360,775.60
  5. Step 5: Solve for x
    x = 8,914,360,775.60/145,910.90
  6. Step 6: Final answer
    x = 61,094.55

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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.