Home / 128,764.58-177,697.28-71,406.32

Finding the Fourth Proportional to 128,764.58, 177,697.28 and 71,406.32

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Solution

The fourth proportional to 128,764.58, 177,697.28 and 71,406.32 is: 98,541.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,764.58 : 177,697.28 = 71,406.32 : x
  2. Step 2: Convert to fraction form
    128,764.58/177,697.28 = 71,406.32/x
  3. Step 3: Cross multiply
    128,764.58x = 177,697.28 × 71,406.32
  4. Step 4: Simplify right side
    128,764.58x = 12,688,707,593.29
  5. Step 5: Solve for x
    x = 12,688,707,593.29/128,764.58
  6. Step 6: Final answer
    x = 98,541.91

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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.