Home / 100,633.10-138,876.21-55,312.22

Finding the Fourth Proportional to 100,633.10, 138,876.21 and 55,312.22

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Solution

The fourth proportional to 100,633.10, 138,876.21 and 55,312.22 is: 76,332.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,633.10 : 138,876.21 = 55,312.22 : x
  2. Step 2: Convert to fraction form
    100,633.10/138,876.21 = 55,312.22/x
  3. Step 3: Cross multiply
    100,633.10x = 138,876.21 × 55,312.22
  4. Step 4: Simplify right side
    100,633.10x = 7,681,550,785.91
  5. Step 5: Solve for x
    x = 7,681,550,785.91/100,633.10
  6. Step 6: Final answer
    x = 76,332.25

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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.