Home / 90,981.12-136,502.64-55,513.44

Finding the Fourth Proportional to 90,981.12, 136,502.64 and 55,513.44

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Solution

The fourth proportional to 90,981.12, 136,502.64 and 55,513.44 is: 83,289.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,981.12 : 136,502.64 = 55,513.44 : x
  2. Step 2: Convert to fraction form
    90,981.12/136,502.64 = 55,513.44/x
  3. Step 3: Cross multiply
    90,981.12x = 136,502.64 × 55,513.44
  4. Step 4: Simplify right side
    90,981.12x = 7,577,731,115.48
  5. Step 5: Solve for x
    x = 7,577,731,115.48/90,981.12
  6. Step 6: Final answer
    x = 83,289.05

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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.