Home / 128,634.90-177,459.58-77,619.18

Finding the Fourth Proportional to 128,634.90, 177,459.58 and 77,619.18

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Solution

The fourth proportional to 128,634.90, 177,459.58 and 77,619.18 is: 107,080.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,634.90 : 177,459.58 = 77,619.18 : x
  2. Step 2: Convert to fraction form
    128,634.90/177,459.58 = 77,619.18/x
  3. Step 3: Cross multiply
    128,634.90x = 177,459.58 × 77,619.18
  4. Step 4: Simplify right side
    128,634.90x = 13,774,267,082.74
  5. Step 5: Solve for x
    x = 13,774,267,082.74/128,634.90
  6. Step 6: Final answer
    x = 107,080.33

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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.