Home / 173,039.60-259,705.20-78,415.40

Finding the Fourth Proportional to 173,039.60, 259,705.20 and 78,415.40

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Solution

The fourth proportional to 173,039.60, 259,705.20 and 78,415.40 is: 117,689.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,039.60 : 259,705.20 = 78,415.40 : x
  2. Step 2: Convert to fraction form
    173,039.60/259,705.20 = 78,415.40/x
  3. Step 3: Cross multiply
    173,039.60x = 259,705.20 × 78,415.40
  4. Step 4: Simplify right side
    173,039.60x = 20,364,887,140.08
  5. Step 5: Solve for x
    x = 20,364,887,140.08/173,039.60
  6. Step 6: Final answer
    x = 117,689.17

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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.