Home / 128,675.50-177,579.27-71,313.63

Finding the Fourth Proportional to 128,675.50, 177,579.27 and 71,313.63

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Solution

The fourth proportional to 128,675.50, 177,579.27 and 71,313.63 is: 98,416.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,675.50 : 177,579.27 = 71,313.63 : x
  2. Step 2: Convert to fraction form
    128,675.50/177,579.27 = 71,313.63/x
  3. Step 3: Cross multiply
    128,675.50x = 177,579.27 × 71,313.63
  4. Step 4: Simplify right side
    128,675.50x = 12,663,822,356.45
  5. Step 5: Solve for x
    x = 12,663,822,356.45/128,675.50
  6. Step 6: Final answer
    x = 98,416.73

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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.