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Finding the Fourth Proportional to 115,722.15, 173,656.94 and 77,340.30

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Solution

The fourth proportional to 115,722.15, 173,656.94 and 77,340.30 is: 116,059.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,722.15 : 173,656.94 = 77,340.30 : x
  2. Step 2: Convert to fraction form
    115,722.15/173,656.94 = 77,340.30/x
  3. Step 3: Cross multiply
    115,722.15x = 173,656.94 × 77,340.30
  4. Step 4: Simplify right side
    115,722.15x = 13,430,679,449.98
  5. Step 5: Solve for x
    x = 13,430,679,449.98/115,722.15
  6. Step 6: Final answer
    x = 116,059.71

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1.5x scale

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.