Home / 128,455.24-177,275.14-71,856.76

Finding the Fourth Proportional to 128,455.24, 177,275.14 and 71,856.76

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Solution

The fourth proportional to 128,455.24, 177,275.14 and 71,856.76 is: 99,166.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,455.24 : 177,275.14 = 71,856.76 : x
  2. Step 2: Convert to fraction form
    128,455.24/177,275.14 = 71,856.76/x
  3. Step 3: Cross multiply
    128,455.24x = 177,275.14 × 71,856.76
  4. Step 4: Simplify right side
    128,455.24x = 12,738,417,188.95
  5. Step 5: Solve for x
    x = 12,738,417,188.95/128,455.24
  6. Step 6: Final answer
    x = 99,166.19

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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.