Home / 128,472.36-177,288.12-71,114.04

Finding the Fourth Proportional to 128,472.36, 177,288.12 and 71,114.04

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Solution

The fourth proportional to 128,472.36, 177,288.12 and 71,114.04 is: 98,135.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,472.36 : 177,288.12 = 71,114.04 : x
  2. Step 2: Convert to fraction form
    128,472.36/177,288.12 = 71,114.04/x
  3. Step 3: Cross multiply
    128,472.36x = 177,288.12 × 71,114.04
  4. Step 4: Simplify right side
    128,472.36x = 12,607,674,457.20
  5. Step 5: Solve for x
    x = 12,607,674,457.20/128,472.36
  6. Step 6: Final answer
    x = 98,135.31

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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.