Home / 90,981.88-136,569.86-80,518.45

Finding the Fourth Proportional to 90,981.88, 136,569.86 and 80,518.45

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Solution

The fourth proportional to 90,981.88, 136,569.86 and 80,518.45 is: 120,863.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,981.88 : 136,569.86 = 80,518.45 : x
  2. Step 2: Convert to fraction form
    90,981.88/136,569.86 = 80,518.45/x
  3. Step 3: Cross multiply
    90,981.88x = 136,569.86 × 80,518.45
  4. Step 4: Simplify right side
    90,981.88x = 10,996,393,303.79
  5. Step 5: Solve for x
    x = 10,996,393,303.79/90,981.88
  6. Step 6: Final answer
    x = 120,863.56

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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.