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Finding the Fourth Proportional to 100,753.83, 139,040.28 and 55,430.84

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Solution

The fourth proportional to 100,753.83, 139,040.28 and 55,430.84 is: 76,494.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,753.83 : 139,040.28 = 55,430.84 : x
  2. Step 2: Convert to fraction form
    100,753.83/139,040.28 = 55,430.84/x
  3. Step 3: Cross multiply
    100,753.83x = 139,040.28 × 55,430.84
  4. Step 4: Simplify right side
    100,753.83x = 7,707,118,819.03
  5. Step 5: Solve for x
    x = 7,707,118,819.03/100,753.83
  6. Step 6: Final answer
    x = 76,494.55

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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.