Home / 128,916.36-177,901.80-71,552.33

Finding the Fourth Proportional to 128,916.36, 177,901.80 and 71,552.33

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Solution

The fourth proportional to 128,916.36, 177,901.80 and 71,552.33 is: 98,740.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,916.36 : 177,901.80 = 71,552.33 : x
  2. Step 2: Convert to fraction form
    128,916.36/177,901.80 = 71,552.33/x
  3. Step 3: Cross multiply
    128,916.36x = 177,901.80 × 71,552.33
  4. Step 4: Simplify right side
    128,916.36x = 12,729,287,411.69
  5. Step 5: Solve for x
    x = 12,729,287,411.69/128,916.36
  6. Step 6: Final answer
    x = 98,740.67

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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.