Home / 78,840.40-118,260.60-49,315.90

Finding the Fourth Proportional to 78,840.40, 118,260.60 and 49,315.90

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Solution

The fourth proportional to 78,840.40, 118,260.60 and 49,315.90 is: 73,973.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,840.40 : 118,260.60 = 49,315.90 : x
  2. Step 2: Convert to fraction form
    78,840.40/118,260.60 = 49,315.90/x
  3. Step 3: Cross multiply
    78,840.40x = 118,260.60 × 49,315.90
  4. Step 4: Simplify right side
    78,840.40x = 5,832,127,923.54
  5. Step 5: Solve for x
    x = 5,832,127,923.54/78,840.40
  6. Step 6: Final answer
    x = 73,973.85

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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.