Home / 100,329.64-138,456.46-55,011.76

Finding the Fourth Proportional to 100,329.64, 138,456.46 and 55,011.76

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Solution

The fourth proportional to 100,329.64, 138,456.46 and 55,011.76 is: 75,917.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,329.64 : 138,456.46 = 55,011.76 : x
  2. Step 2: Convert to fraction form
    100,329.64/138,456.46 = 55,011.76/x
  3. Step 3: Cross multiply
    100,329.64x = 138,456.46 × 55,011.76
  4. Step 4: Simplify right side
    100,329.64x = 7,616,733,547.97
  5. Step 5: Solve for x
    x = 7,616,733,547.97/100,329.64
  6. Step 6: Final answer
    x = 75,917.08

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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.