Home / 128,272.50-177,017.18-70,910.91

Finding the Fourth Proportional to 128,272.50, 177,017.18 and 70,910.91

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Solution

The fourth proportional to 128,272.50, 177,017.18 and 70,910.91 is: 97,857.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,272.50 : 177,017.18 = 70,910.91 : x
  2. Step 2: Convert to fraction form
    128,272.50/177,017.18 = 70,910.91/x
  3. Step 3: Cross multiply
    128,272.50x = 177,017.18 × 70,910.91
  4. Step 4: Simplify right side
    128,272.50x = 12,552,448,964.88
  5. Step 5: Solve for x
    x = 12,552,448,964.88/128,272.50
  6. Step 6: Final answer
    x = 97,857.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.