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Finding the Fourth Proportional to 243,028.80, 364,543.20 and 85,200.30

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Solution

The fourth proportional to 243,028.80, 364,543.20 and 85,200.30 is: 127,800.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,028.80 : 364,543.20 = 85,200.30 : x
  2. Step 2: Convert to fraction form
    243,028.80/364,543.20 = 85,200.30/x
  3. Step 3: Cross multiply
    243,028.80x = 364,543.20 × 85,200.30
  4. Step 4: Simplify right side
    243,028.80x = 31,059,190,002.96
  5. Step 5: Solve for x
    x = 31,059,190,002.96/243,028.80
  6. Step 6: Final answer
    x = 127,800.45

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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.