Home / 138,421.62-191,030.40-80,290.14

Finding the Fourth Proportional to 138,421.62, 191,030.40 and 80,290.14

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Solution

The fourth proportional to 138,421.62, 191,030.40 and 80,290.14 is: 110,805.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,421.62 : 191,030.40 = 80,290.14 : x
  2. Step 2: Convert to fraction form
    138,421.62/191,030.40 = 80,290.14/x
  3. Step 3: Cross multiply
    138,421.62x = 191,030.40 × 80,290.14
  4. Step 4: Simplify right side
    138,421.62x = 15,337,857,560.26
  5. Step 5: Solve for x
    x = 15,337,857,560.26/138,421.62
  6. Step 6: Final answer
    x = 110,805.36

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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.