Home / 128,890.17-177,867.45-71,528.94

Finding the Fourth Proportional to 128,890.17, 177,867.45 and 71,528.94

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Solution

The fourth proportional to 128,890.17, 177,867.45 and 71,528.94 is: 98,709.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,890.17 : 177,867.45 = 71,528.94 : x
  2. Step 2: Convert to fraction form
    128,890.17/177,867.45 = 71,528.94/x
  3. Step 3: Cross multiply
    128,890.17x = 177,867.45 × 71,528.94
  4. Step 4: Simplify right side
    128,890.17x = 12,722,670,159.00
  5. Step 5: Solve for x
    x = 12,722,670,159.00/128,890.17
  6. Step 6: Final answer
    x = 98,709.39

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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.