Home / 128,603.15-177,559.01-80,278.65

Finding the Fourth Proportional to 128,603.15, 177,559.01 and 80,278.65

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Solution

The fourth proportional to 128,603.15, 177,559.01 and 80,278.65 is: 110,838.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,603.15 : 177,559.01 = 80,278.65 : x
  2. Step 2: Convert to fraction form
    128,603.15/177,559.01 = 80,278.65/x
  3. Step 3: Cross multiply
    128,603.15x = 177,559.01 × 80,278.65
  4. Step 4: Simplify right side
    128,603.15x = 14,254,197,216.74
  5. Step 5: Solve for x
    x = 14,254,197,216.74/128,603.15
  6. Step 6: Final answer
    x = 110,838.64

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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.