Home / 42,730.80-64,119.20-17,788.08

Finding the Fourth Proportional to 42,730.80, 64,119.20 and 17,788.08

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Solution

The fourth proportional to 42,730.80, 64,119.20 and 17,788.08 is: 26,691.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,730.80 : 64,119.20 = 17,788.08 : x
  2. Step 2: Convert to fraction form
    42,730.80/64,119.20 = 17,788.08/x
  3. Step 3: Cross multiply
    42,730.80x = 64,119.20 × 17,788.08
  4. Step 4: Simplify right side
    42,730.80x = 1,140,557,459.14
  5. Step 5: Solve for x
    x = 1,140,557,459.14/42,730.80
  6. Step 6: Final answer
    x = 26,691.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.