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Finding the Fourth Proportional to 115,103.67, 172,597.65 and 67,087.74

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Solution

The fourth proportional to 115,103.67, 172,597.65 and 67,087.74 is: 100,597.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,103.67 : 172,597.65 = 67,087.74 : x
  2. Step 2: Convert to fraction form
    115,103.67/172,597.65 = 67,087.74/x
  3. Step 3: Cross multiply
    115,103.67x = 172,597.65 × 67,087.74
  4. Step 4: Simplify right side
    115,103.67x = 11,579,186,267.81
  5. Step 5: Solve for x
    x = 11,579,186,267.81/115,103.67
  6. Step 6: Final answer
    x = 100,597.89

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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.