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Finding the Fourth Proportional to 100,859.88, 139,189.98 and 55,541.22

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Solution

The fourth proportional to 100,859.88, 139,189.98 and 55,541.22 is: 76,648.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,859.88 : 139,189.98 = 55,541.22 : x
  2. Step 2: Convert to fraction form
    100,859.88/139,189.98 = 55,541.22/x
  3. Step 3: Cross multiply
    100,859.88x = 139,189.98 × 55,541.22
  4. Step 4: Simplify right side
    100,859.88x = 7,730,781,300.98
  5. Step 5: Solve for x
    x = 7,730,781,300.98/100,859.88
  6. Step 6: Final answer
    x = 76,648.73

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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.