Home / 78,870.09-118,305.39-19,705.77

Finding the Fourth Proportional to 78,870.09, 118,305.39 and 19,705.77

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Solution

The fourth proportional to 78,870.09, 118,305.39 and 19,705.77 is: 29,558.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,870.09 : 118,305.39 = 19,705.77 : x
  2. Step 2: Convert to fraction form
    78,870.09/118,305.39 = 19,705.77/x
  3. Step 3: Cross multiply
    78,870.09x = 118,305.39 × 19,705.77
  4. Step 4: Simplify right side
    78,870.09x = 2,331,298,879.00
  5. Step 5: Solve for x
    x = 2,331,298,879.00/78,870.09
  6. Step 6: Final answer
    x = 29,558.72

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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.