Home / 100,429.20-138,587.65-55,106.06

Finding the Fourth Proportional to 100,429.20, 138,587.65 and 55,106.06

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Solution

The fourth proportional to 100,429.20, 138,587.65 and 55,106.06 is: 76,043.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,429.20 : 138,587.65 = 55,106.06 : x
  2. Step 2: Convert to fraction form
    100,429.20/138,587.65 = 55,106.06/x
  3. Step 3: Cross multiply
    100,429.20x = 138,587.65 × 55,106.06
  4. Step 4: Simplify right side
    100,429.20x = 7,637,018,680.44
  5. Step 5: Solve for x
    x = 7,637,018,680.44/100,429.20
  6. Step 6: Final answer
    x = 76,043.81

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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.