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Finding the Fourth Proportional to 173,991.10, 260,986.65 and 85,417.60

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Solution

The fourth proportional to 173,991.10, 260,986.65 and 85,417.60 is: 128,126.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,991.10 : 260,986.65 = 85,417.60 : x
  2. Step 2: Convert to fraction form
    173,991.10/260,986.65 = 85,417.60/x
  3. Step 3: Cross multiply
    173,991.10x = 260,986.65 × 85,417.60
  4. Step 4: Simplify right side
    173,991.10x = 22,292,853,275.04
  5. Step 5: Solve for x
    x = 22,292,853,275.04/173,991.10
  6. Step 6: Final answer
    x = 128,126.40

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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.