Home / 128,296.17-177,054.12-71,707.50

Finding the Fourth Proportional to 128,296.17, 177,054.12 and 71,707.50

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Solution

The fourth proportional to 128,296.17, 177,054.12 and 71,707.50 is: 98,959.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,296.17 : 177,054.12 = 71,707.50 : x
  2. Step 2: Convert to fraction form
    128,296.17/177,054.12 = 71,707.50/x
  3. Step 3: Cross multiply
    128,296.17x = 177,054.12 × 71,707.50
  4. Step 4: Simplify right side
    128,296.17x = 12,696,108,309.90
  5. Step 5: Solve for x
    x = 12,696,108,309.90/128,296.17
  6. Step 6: Final answer
    x = 98,959.37

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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.