Home / 78,730.68-118,119.11-25,421.49

Finding the Fourth Proportional to 78,730.68, 118,119.11 and 25,421.49

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Solution

The fourth proportional to 78,730.68, 118,119.11 and 25,421.49 is: 38,139.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,730.68 : 118,119.11 = 25,421.49 : x
  2. Step 2: Convert to fraction form
    78,730.68/118,119.11 = 25,421.49/x
  3. Step 3: Cross multiply
    78,730.68x = 118,119.11 × 25,421.49
  4. Step 4: Simplify right side
    78,730.68x = 3,002,763,646.57
  5. Step 5: Solve for x
    x = 3,002,763,646.57/78,730.68
  6. Step 6: Final answer
    x = 38,139.69

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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.