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Finding the Fourth Proportional to 90,977.86, 136,440.86 and 57,647.62

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Solution

The fourth proportional to 90,977.86, 136,440.86 and 57,647.62 is: 86,455.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,977.86 : 136,440.86 = 57,647.62 : x
  2. Step 2: Convert to fraction form
    90,977.86/136,440.86 = 57,647.62/x
  3. Step 3: Cross multiply
    90,977.86x = 136,440.86 × 57,647.62
  4. Step 4: Simplify right side
    90,977.86x = 7,865,490,849.75
  5. Step 5: Solve for x
    x = 7,865,490,849.75/90,977.86
  6. Step 6: Final answer
    x = 86,455.00

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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.