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Finding the Fourth Proportional to 243,003.60, 364,505.40 and 85,211.55

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Solution

The fourth proportional to 243,003.60, 364,505.40 and 85,211.55 is: 127,817.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,003.60 : 364,505.40 = 85,211.55 : x
  2. Step 2: Convert to fraction form
    243,003.60/364,505.40 = 85,211.55/x
  3. Step 3: Cross multiply
    243,003.60x = 364,505.40 × 85,211.55
  4. Step 4: Simplify right side
    243,003.60x = 31,060,070,117.37
  5. Step 5: Solve for x
    x = 31,060,070,117.37/243,003.60
  6. Step 6: Final answer
    x = 127,817.33

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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.