Home / 78,891.10-118,336.64-19,726.77

Finding the Fourth Proportional to 78,891.10, 118,336.64 and 19,726.77

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Solution

The fourth proportional to 78,891.10, 118,336.64 and 19,726.77 is: 29,590.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,891.10 : 118,336.64 = 19,726.77 : x
  2. Step 2: Convert to fraction form
    78,891.10/118,336.64 = 19,726.77/x
  3. Step 3: Cross multiply
    78,891.10x = 118,336.64 × 19,726.77
  4. Step 4: Simplify right side
    78,891.10x = 2,334,399,359.34
  5. Step 5: Solve for x
    x = 2,334,399,359.34/78,891.10
  6. Step 6: Final answer
    x = 29,590.15

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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.