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Finding the Fourth Proportional to 115,209.70, 172,923.90 and 70,922.95

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Solution

The fourth proportional to 115,209.70, 172,923.90 and 70,922.95 is: 106,451.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,209.70 : 172,923.90 = 70,922.95 : x
  2. Step 2: Convert to fraction form
    115,209.70/172,923.90 = 70,922.95/x
  3. Step 3: Cross multiply
    115,209.70x = 172,923.90 × 70,922.95
  4. Step 4: Simplify right side
    115,209.70x = 12,264,273,113.51
  5. Step 5: Solve for x
    x = 12,264,273,113.51/115,209.70
  6. Step 6: Final answer
    x = 106,451.74

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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.