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Finding the Fourth Proportional to 92,887.65, 128,195.90 and 55,161.90

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Solution

The fourth proportional to 92,887.65, 128,195.90 and 55,161.90 is: 76,129.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,887.65 : 128,195.90 = 55,161.90 : x
  2. Step 2: Convert to fraction form
    92,887.65/128,195.90 = 55,161.90/x
  3. Step 3: Cross multiply
    92,887.65x = 128,195.90 × 55,161.90
  4. Step 4: Simplify right side
    92,887.65x = 7,071,529,416.21
  5. Step 5: Solve for x
    x = 7,071,529,416.21/92,887.65
  6. Step 6: Final answer
    x = 76,129.92

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1.5x scale

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.