Home / 128,185.68-176,899.80-70,828.70

Finding the Fourth Proportional to 128,185.68, 176,899.80 and 70,828.70

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Solution

The fourth proportional to 128,185.68, 176,899.80 and 70,828.70 is: 97,745.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,185.68 : 176,899.80 = 70,828.70 : x
  2. Step 2: Convert to fraction form
    128,185.68/176,899.80 = 70,828.70/x
  3. Step 3: Cross multiply
    128,185.68x = 176,899.80 × 70,828.70
  4. Step 4: Simplify right side
    128,185.68x = 12,529,582,864.26
  5. Step 5: Solve for x
    x = 12,529,582,864.26/128,185.68
  6. Step 6: Final answer
    x = 97,745.57

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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.