Home / 128,922.01-177,913.74-71,562.40

Finding the Fourth Proportional to 128,922.01, 177,913.74 and 71,562.40

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Solution

The fourth proportional to 128,922.01, 177,913.74 and 71,562.40 is: 98,756.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,922.01 : 177,913.74 = 71,562.40 : x
  2. Step 2: Convert to fraction form
    128,922.01/177,913.74 = 71,562.40/x
  3. Step 3: Cross multiply
    128,922.01x = 177,913.74 × 71,562.40
  4. Step 4: Simplify right side
    128,922.01x = 12,731,934,227.38
  5. Step 5: Solve for x
    x = 12,731,934,227.38/128,922.01
  6. Step 6: Final answer
    x = 98,756.87

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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.