Home / 78,790.16-118,185.51-19,625.72

Finding the Fourth Proportional to 78,790.16, 118,185.51 and 19,625.72

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Solution

The fourth proportional to 78,790.16, 118,185.51 and 19,625.72 is: 29,438.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,790.16 : 118,185.51 = 19,625.72 : x
  2. Step 2: Convert to fraction form
    78,790.16/118,185.51 = 19,625.72/x
  3. Step 3: Cross multiply
    78,790.16x = 118,185.51 × 19,625.72
  4. Step 4: Simplify right side
    78,790.16x = 2,319,475,727.32
  5. Step 5: Solve for x
    x = 2,319,475,727.32/78,790.16
  6. Step 6: Final answer
    x = 29,438.65

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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.