Home / 78,389.40-117,550.08-28,452.90

Finding the Fourth Proportional to 78,389.40, 117,550.08 and 28,452.90

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Solution

The fourth proportional to 78,389.40, 117,550.08 and 28,452.90 is: 42,667.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,389.40 : 117,550.08 = 28,452.90 : x
  2. Step 2: Convert to fraction form
    78,389.40/117,550.08 = 28,452.90/x
  3. Step 3: Cross multiply
    78,389.40x = 117,550.08 × 28,452.90
  4. Step 4: Simplify right side
    78,389.40x = 3,344,640,671.23
  5. Step 5: Solve for x
    x = 3,344,640,671.23/78,389.40
  6. Step 6: Final answer
    x = 42,667.00

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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.