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Finding the Fourth Proportional to 243,529.77, 365,331.12 and 85,730.43

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Solution

The fourth proportional to 243,529.77, 365,331.12 and 85,730.43 is: 128,608.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,529.77 : 365,331.12 = 85,730.43 : x
  2. Step 2: Convert to fraction form
    243,529.77/365,331.12 = 85,730.43/x
  3. Step 3: Cross multiply
    243,529.77x = 365,331.12 × 85,730.43
  4. Step 4: Simplify right side
    243,529.77x = 31,319,994,009.98
  5. Step 5: Solve for x
    x = 31,319,994,009.98/243,529.77
  6. Step 6: Final answer
    x = 128,608.48

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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.