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Finding the Fourth Proportional to 187,172.85, 280,788.43 and 112,275.39

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Solution

The fourth proportional to 187,172.85, 280,788.43 and 112,275.39 is: 168,430.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,172.85 : 280,788.43 = 112,275.39 : x
  2. Step 2: Convert to fraction form
    187,172.85/280,788.43 = 112,275.39/x
  3. Step 3: Cross multiply
    187,172.85x = 280,788.43 × 112,275.39
  4. Step 4: Simplify right side
    187,172.85x = 31,525,630,485.74
  5. Step 5: Solve for x
    x = 31,525,630,485.74/187,172.85
  6. Step 6: Final answer
    x = 168,430.57

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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.