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Finding the Fourth Proportional to 243,012.30, 364,518.45 and 85,183.80

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Solution

The fourth proportional to 243,012.30, 364,518.45 and 85,183.80 is: 127,775.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,012.30 : 364,518.45 = 85,183.80 : x
  2. Step 2: Convert to fraction form
    243,012.30/364,518.45 = 85,183.80/x
  3. Step 3: Cross multiply
    243,012.30x = 364,518.45 × 85,183.80
  4. Step 4: Simplify right side
    243,012.30x = 31,051,066,741.11
  5. Step 5: Solve for x
    x = 31,051,066,741.11/243,012.30
  6. Step 6: Final answer
    x = 127,775.70

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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.