Home / 128,428.17-177,400.32-98,582.31

Finding the Fourth Proportional to 128,428.17, 177,400.32 and 98,582.31

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Solution

The fourth proportional to 128,428.17, 177,400.32 and 98,582.31 is: 136,173.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,428.17 : 177,400.32 = 98,582.31 : x
  2. Step 2: Convert to fraction form
    128,428.17/177,400.32 = 98,582.31/x
  3. Step 3: Cross multiply
    128,428.17x = 177,400.32 × 98,582.31
  4. Step 4: Simplify right side
    128,428.17x = 17,488,533,340.34
  5. Step 5: Solve for x
    x = 17,488,533,340.34/128,428.17
  6. Step 6: Final answer
    x = 136,173.66

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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.