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Finding the Fourth Proportional to 173,856.60, 260,720.10 and 121,109.40

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Solution

The fourth proportional to 173,856.60, 260,720.10 and 121,109.40 is: 181,618.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,856.60 : 260,720.10 = 121,109.40 : x
  2. Step 2: Convert to fraction form
    173,856.60/260,720.10 = 121,109.40/x
  3. Step 3: Cross multiply
    173,856.60x = 260,720.10 × 121,109.40
  4. Step 4: Simplify right side
    173,856.60x = 31,575,654,878.94
  5. Step 5: Solve for x
    x = 31,575,654,878.94/173,856.60
  6. Step 6: Final answer
    x = 181,618.96

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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.