Home / 128,705.18-177,507.86-90,590.91

Finding the Fourth Proportional to 128,705.18, 177,507.86 and 90,590.91

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Solution

The fourth proportional to 128,705.18, 177,507.86 and 90,590.91 is: 124,941.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,705.18 : 177,507.86 = 90,590.91 : x
  2. Step 2: Convert to fraction form
    128,705.18/177,507.86 = 90,590.91/x
  3. Step 3: Cross multiply
    128,705.18x = 177,507.86 × 90,590.91
  4. Step 4: Simplify right side
    128,705.18x = 16,080,597,450.94
  5. Step 5: Solve for x
    x = 16,080,597,450.94/128,705.18
  6. Step 6: Final answer
    x = 124,941.34

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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.