Home / 128,303.90-177,054.62-71,716.22

Finding the Fourth Proportional to 128,303.90, 177,054.62 and 71,716.22

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Solution

The fourth proportional to 128,303.90, 177,054.62 and 71,716.22 is: 98,965.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,303.90 : 177,054.62 = 71,716.22 : x
  2. Step 2: Convert to fraction form
    128,303.90/177,054.62 = 71,716.22/x
  3. Step 3: Cross multiply
    128,303.90x = 177,054.62 × 71,716.22
  4. Step 4: Simplify right side
    128,303.90x = 12,697,688,079.94
  5. Step 5: Solve for x
    x = 12,697,688,079.94/128,303.90
  6. Step 6: Final answer
    x = 98,965.72

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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.