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Finding the Fourth Proportional to 243,990.56, 366,015.36 and 86,186.72

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Solution

The fourth proportional to 243,990.56, 366,015.36 and 86,186.72 is: 129,290.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,990.56 : 366,015.36 = 86,186.72 : x
  2. Step 2: Convert to fraction form
    243,990.56/366,015.36 = 86,186.72/x
  3. Step 3: Cross multiply
    243,990.56x = 366,015.36 × 86,186.72
  4. Step 4: Simplify right side
    243,990.56x = 31,545,663,348.02
  5. Step 5: Solve for x
    x = 31,545,663,348.02/243,990.56
  6. Step 6: Final answer
    x = 129,290.51

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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.