Home / 100,238.11-138,328.51-54,918.91

Finding the Fourth Proportional to 100,238.11, 138,328.51 and 54,918.91

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Solution

The fourth proportional to 100,238.11, 138,328.51 and 54,918.91 is: 75,788.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,238.11 : 138,328.51 = 54,918.91 : x
  2. Step 2: Convert to fraction form
    100,238.11/138,328.51 = 54,918.91/x
  3. Step 3: Cross multiply
    100,238.11x = 138,328.51 × 54,918.91
  4. Step 4: Simplify right side
    100,238.11x = 7,596,851,129.71
  5. Step 5: Solve for x
    x = 7,596,851,129.71/100,238.11
  6. Step 6: Final answer
    x = 75,788.05

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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.