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Finding the Fourth Proportional to 209,160.90, 313,708.32 and 90,800.46

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Solution

The fourth proportional to 209,160.90, 313,708.32 and 90,800.46 is: 136,186.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,160.90 : 313,708.32 = 90,800.46 : x
  2. Step 2: Convert to fraction form
    209,160.90/313,708.32 = 90,800.46/x
  3. Step 3: Cross multiply
    209,160.90x = 313,708.32 × 90,800.46
  4. Step 4: Simplify right side
    209,160.90x = 28,484,859,761.83
  5. Step 5: Solve for x
    x = 28,484,859,761.83/209,160.90
  6. Step 6: Final answer
    x = 136,186.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.