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Finding the Fourth Proportional to 115,239.60, 172,859.40 and 68,000.40

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Solution

The fourth proportional to 115,239.60, 172,859.40 and 68,000.40 is: 102,000.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,239.60 : 172,859.40 = 68,000.40 : x
  2. Step 2: Convert to fraction form
    115,239.60/172,859.40 = 68,000.40/x
  3. Step 3: Cross multiply
    115,239.60x = 172,859.40 × 68,000.40
  4. Step 4: Simplify right side
    115,239.60x = 11,754,508,343.76
  5. Step 5: Solve for x
    x = 11,754,508,343.76/115,239.60
  6. Step 6: Final answer
    x = 102,000.60

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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.