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Finding the Fourth Proportional to 128,322.70, 177,080.24 and 70,958.30

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Solution

The fourth proportional to 128,322.70, 177,080.24 and 70,958.30 is: 97,919.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,322.70 : 177,080.24 = 70,958.30 : x
  2. Step 2: Convert to fraction form
    128,322.70/177,080.24 = 70,958.30/x
  3. Step 3: Cross multiply
    128,322.70x = 177,080.24 × 70,958.30
  4. Step 4: Simplify right side
    128,322.70x = 12,565,312,085.99
  5. Step 5: Solve for x
    x = 12,565,312,085.99/128,322.70
  6. Step 6: Final answer
    x = 97,919.64

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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.