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Finding the Fourth Proportional to 243,489.44, 365,339.76 and 85,830.56

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Solution

The fourth proportional to 243,489.44, 365,339.76 and 85,830.56 is: 128,783.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,489.44 : 365,339.76 = 85,830.56 : x
  2. Step 2: Convert to fraction form
    243,489.44/365,339.76 = 85,830.56/x
  3. Step 3: Cross multiply
    243,489.44x = 365,339.76 × 85,830.56
  4. Step 4: Simplify right side
    243,489.44x = 31,357,316,191.07
  5. Step 5: Solve for x
    x = 31,357,316,191.07/243,489.44
  6. Step 6: Final answer
    x = 128,783.06

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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.