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Finding the Fourth Proportional to 199,967.79, 275,985.60 and 115,068.45

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Solution

The fourth proportional to 199,967.79, 275,985.60 and 115,068.45 is: 158,811.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,967.79 : 275,985.60 = 115,068.45 : x
  2. Step 2: Convert to fraction form
    199,967.79/275,985.60 = 115,068.45/x
  3. Step 3: Cross multiply
    199,967.79x = 275,985.60 × 115,068.45
  4. Step 4: Simplify right side
    199,967.79x = 31,757,235,214.32
  5. Step 5: Solve for x
    x = 31,757,235,214.32/199,967.79
  6. Step 6: Final answer
    x = 158,811.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.