Home / 78,400.90-117,567.33-28,464.40

Finding the Fourth Proportional to 78,400.90, 117,567.33 and 28,464.40

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Solution

The fourth proportional to 78,400.90, 117,567.33 and 28,464.40 is: 42,684.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,400.90 : 117,567.33 = 28,464.40 : x
  2. Step 2: Convert to fraction form
    78,400.90/117,567.33 = 28,464.40/x
  3. Step 3: Cross multiply
    78,400.90x = 117,567.33 × 28,464.40
  4. Step 4: Simplify right side
    78,400.90x = 3,346,483,508.05
  5. Step 5: Solve for x
    x = 3,346,483,508.05/78,400.90
  6. Step 6: Final answer
    x = 42,684.25

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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.