Home / 128,914.16-177,898.78-71,550.14

Finding the Fourth Proportional to 128,914.16, 177,898.78 and 71,550.14

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Solution

The fourth proportional to 128,914.16, 177,898.78 and 71,550.14 is: 98,737.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,914.16 : 177,898.78 = 71,550.14 : x
  2. Step 2: Convert to fraction form
    128,914.16/177,898.78 = 71,550.14/x
  3. Step 3: Cross multiply
    128,914.16x = 177,898.78 × 71,550.14
  4. Step 4: Simplify right side
    128,914.16x = 12,728,681,814.77
  5. Step 5: Solve for x
    x = 12,728,681,814.77/128,914.16
  6. Step 6: Final answer
    x = 98,737.66

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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.