Home / 128,226.60-176,890.50-90,417.96

Finding the Fourth Proportional to 128,226.60, 176,890.50 and 90,417.96

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Solution

The fourth proportional to 128,226.60, 176,890.50 and 90,417.96 is: 124,732.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,226.60 : 176,890.50 = 90,417.96 : x
  2. Step 2: Convert to fraction form
    128,226.60/176,890.50 = 90,417.96/x
  3. Step 3: Cross multiply
    128,226.60x = 176,890.50 × 90,417.96
  4. Step 4: Simplify right side
    128,226.60x = 15,994,078,153.38
  5. Step 5: Solve for x
    x = 15,994,078,153.38/128,226.60
  6. Step 6: Final answer
    x = 124,732.92

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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.