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Finding the Fourth Proportional to 145,999.40, 218,999.10 and 40,818.20

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Solution

The fourth proportional to 145,999.40, 218,999.10 and 40,818.20 is: 61,227.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,999.40 : 218,999.10 = 40,818.20 : x
  2. Step 2: Convert to fraction form
    145,999.40/218,999.10 = 40,818.20/x
  3. Step 3: Cross multiply
    145,999.40x = 218,999.10 × 40,818.20
  4. Step 4: Simplify right side
    145,999.40x = 8,939,149,063.62
  5. Step 5: Solve for x
    x = 8,939,149,063.62/145,999.40
  6. Step 6: Final answer
    x = 61,227.30

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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.