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Finding the Fourth Proportional to 100,542.99, 138,750.90 and 55,225.62

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Solution

The fourth proportional to 100,542.99, 138,750.90 and 55,225.62 is: 76,212.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,542.99 : 138,750.90 = 55,225.62 : x
  2. Step 2: Convert to fraction form
    100,542.99/138,750.90 = 55,225.62/x
  3. Step 3: Cross multiply
    100,542.99x = 138,750.90 × 55,225.62
  4. Step 4: Simplify right side
    100,542.99x = 7,662,604,478.06
  5. Step 5: Solve for x
    x = 7,662,604,478.06/100,542.99
  6. Step 6: Final answer
    x = 76,212.22

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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.