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Finding the Fourth Proportional to 128,011.80, 176,582.82 and 74,289.96

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Solution

The fourth proportional to 128,011.80, 176,582.82 and 74,289.96 is: 102,477.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,011.80 : 176,582.82 = 74,289.96 : x
  2. Step 2: Convert to fraction form
    128,011.80/176,582.82 = 74,289.96/x
  3. Step 3: Cross multiply
    128,011.80x = 176,582.82 × 74,289.96
  4. Step 4: Simplify right side
    128,011.80x = 13,118,330,634.49
  5. Step 5: Solve for x
    x = 13,118,330,634.49/128,011.80
  6. Step 6: Final answer
    x = 102,477.51

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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.