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Finding the Fourth Proportional to 90,520.50, 124,918.29 and 55,192.50

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Solution

The fourth proportional to 90,520.50, 124,918.29 and 55,192.50 is: 76,165.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,520.50 : 124,918.29 = 55,192.50 : x
  2. Step 2: Convert to fraction form
    90,520.50/124,918.29 = 55,192.50/x
  3. Step 3: Cross multiply
    90,520.50x = 124,918.29 × 55,192.50
  4. Step 4: Simplify right side
    90,520.50x = 6,894,552,720.83
  5. Step 5: Solve for x
    x = 6,894,552,720.83/90,520.50
  6. Step 6: Final answer
    x = 76,165.65

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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.