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Finding the Fourth Proportional to 115,274.40, 172,911.60 and 70,756.80

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Solution

The fourth proportional to 115,274.40, 172,911.60 and 70,756.80 is: 106,135.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,274.40 : 172,911.60 = 70,756.80 : x
  2. Step 2: Convert to fraction form
    115,274.40/172,911.60 = 70,756.80/x
  3. Step 3: Cross multiply
    115,274.40x = 172,911.60 × 70,756.80
  4. Step 4: Simplify right side
    115,274.40x = 12,234,671,498.88
  5. Step 5: Solve for x
    x = 12,234,671,498.88/115,274.40
  6. Step 6: Final answer
    x = 106,135.20

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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.