Home / 78,832.31-118,178.13-28,900.75

Finding the Fourth Proportional to 78,832.31, 118,178.13 and 28,900.75

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Solution

The fourth proportional to 78,832.31, 118,178.13 and 28,900.75 is: 43,325.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,832.31 : 118,178.13 = 28,900.75 : x
  2. Step 2: Convert to fraction form
    78,832.31/118,178.13 = 28,900.75/x
  3. Step 3: Cross multiply
    78,832.31x = 118,178.13 × 28,900.75
  4. Step 4: Simplify right side
    78,832.31x = 3,415,435,999.71
  5. Step 5: Solve for x
    x = 3,415,435,999.71/78,832.31
  6. Step 6: Final answer
    x = 43,325.33

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1.5x scale

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.