Home / 100,780.27-139,077.27-55,457.12

Finding the Fourth Proportional to 100,780.27, 139,077.27 and 55,457.12

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Solution

The fourth proportional to 100,780.27, 139,077.27 and 55,457.12 is: 76,531.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,780.27 : 139,077.27 = 55,457.12 : x
  2. Step 2: Convert to fraction form
    100,780.27/139,077.27 = 55,457.12/x
  3. Step 3: Cross multiply
    100,780.27x = 139,077.27 × 55,457.12
  4. Step 4: Simplify right side
    100,780.27x = 7,712,825,199.36
  5. Step 5: Solve for x
    x = 7,712,825,199.36/100,780.27
  6. Step 6: Final answer
    x = 76,531.10

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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.