Home / 135,403.05-186,798.32-81,657.51

Finding the Fourth Proportional to 135,403.05, 186,798.32 and 81,657.51

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Solution

The fourth proportional to 135,403.05, 186,798.32 and 81,657.51 is: 112,652.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,403.05 : 186,798.32 = 81,657.51 : x
  2. Step 2: Convert to fraction form
    135,403.05/186,798.32 = 81,657.51/x
  3. Step 3: Cross multiply
    135,403.05x = 186,798.32 × 81,657.51
  4. Step 4: Simplify right side
    135,403.05x = 15,253,485,275.10
  5. Step 5: Solve for x
    x = 15,253,485,275.10/135,403.05
  6. Step 6: Final answer
    x = 112,652.45

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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.