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Finding the Fourth Proportional to 115,114.60, 172,671.90 and 68,343.40

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Solution

The fourth proportional to 115,114.60, 172,671.90 and 68,343.40 is: 102,515.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,114.60 : 172,671.90 = 68,343.40 : x
  2. Step 2: Convert to fraction form
    115,114.60/172,671.90 = 68,343.40/x
  3. Step 3: Cross multiply
    115,114.60x = 172,671.90 × 68,343.40
  4. Step 4: Simplify right side
    115,114.60x = 11,800,984,730.46
  5. Step 5: Solve for x
    x = 11,800,984,730.46/115,114.60
  6. Step 6: Final answer
    x = 102,515.10

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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.