Home / 128,927.24-177,916.80-71,563.20

Finding the Fourth Proportional to 128,927.24, 177,916.80 and 71,563.20

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Solution

The fourth proportional to 128,927.24, 177,916.80 and 71,563.20 is: 98,755.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,927.24 : 177,916.80 = 71,563.20 : x
  2. Step 2: Convert to fraction form
    128,927.24/177,916.80 = 71,563.20/x
  3. Step 3: Cross multiply
    128,927.24x = 177,916.80 × 71,563.20
  4. Step 4: Simplify right side
    128,927.24x = 12,732,295,541.76
  5. Step 5: Solve for x
    x = 12,732,295,541.76/128,927.24
  6. Step 6: Final answer
    x = 98,755.67

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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.