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Finding the Fourth Proportional to 173,886.10, 260,764.35 and 121,138.90

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Solution

The fourth proportional to 173,886.10, 260,764.35 and 121,138.90 is: 181,663.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,886.10 : 260,764.35 = 121,138.90 : x
  2. Step 2: Convert to fraction form
    173,886.10/260,764.35 = 121,138.90/x
  3. Step 3: Cross multiply
    173,886.10x = 260,764.35 × 121,138.90
  4. Step 4: Simplify right side
    173,886.10x = 31,588,706,518.22
  5. Step 5: Solve for x
    x = 31,588,706,518.22/173,886.10
  6. Step 6: Final answer
    x = 181,663.21

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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.