Home / 128,426.28-177,228.74-71,837.66

Finding the Fourth Proportional to 128,426.28, 177,228.74 and 71,837.66

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Solution

The fourth proportional to 128,426.28, 177,228.74 and 71,837.66 is: 99,136.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,426.28 : 177,228.74 = 71,837.66 : x
  2. Step 2: Convert to fraction form
    128,426.28/177,228.74 = 71,837.66/x
  3. Step 3: Cross multiply
    128,426.28x = 177,228.74 × 71,837.66
  4. Step 4: Simplify right side
    128,426.28x = 12,731,697,966.35
  5. Step 5: Solve for x
    x = 12,731,697,966.35/128,426.28
  6. Step 6: Final answer
    x = 99,136.24

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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.