Home / 100,290.29-138,421.17-57,843.05

Finding the Fourth Proportional to 100,290.29, 138,421.17 and 57,843.05

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Solution

The fourth proportional to 100,290.29, 138,421.17 and 57,843.05 is: 79,835.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,290.29 : 138,421.17 = 57,843.05 : x
  2. Step 2: Convert to fraction form
    100,290.29/138,421.17 = 57,843.05/x
  3. Step 3: Cross multiply
    100,290.29x = 138,421.17 × 57,843.05
  4. Step 4: Simplify right side
    100,290.29x = 8,006,701,965.26
  5. Step 5: Solve for x
    x = 8,006,701,965.26/100,290.29
  6. Step 6: Final answer
    x = 79,835.27

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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.