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Finding the Fourth Proportional to 155,777.76, 214,983.42 and 90,379.98

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Solution

The fourth proportional to 155,777.76, 214,983.42 and 90,379.98 is: 124,730.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,777.76 : 214,983.42 = 90,379.98 : x
  2. Step 2: Convert to fraction form
    155,777.76/214,983.42 = 90,379.98/x
  3. Step 3: Cross multiply
    155,777.76x = 214,983.42 × 90,379.98
  4. Step 4: Simplify right side
    155,777.76x = 19,430,197,199.93
  5. Step 5: Solve for x
    x = 19,430,197,199.93/155,777.76
  6. Step 6: Final answer
    x = 124,730.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.