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Finding the Fourth Proportional to 172,447.04, 258,699.72 and 78,960.08

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Solution

The fourth proportional to 172,447.04, 258,699.72 and 78,960.08 is: 118,453.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,447.04 : 258,699.72 = 78,960.08 : x
  2. Step 2: Convert to fraction form
    172,447.04/258,699.72 = 78,960.08/x
  3. Step 3: Cross multiply
    172,447.04x = 258,699.72 × 78,960.08
  4. Step 4: Simplify right side
    172,447.04x = 20,426,950,587.18
  5. Step 5: Solve for x
    x = 20,426,950,587.18/172,447.04
  6. Step 6: Final answer
    x = 118,453.47

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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.