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Finding the Fourth Proportional to 90,972.76, 136,292.88 and 65,950.76

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Solution

The fourth proportional to 90,972.76, 136,292.88 and 65,950.76 is: 98,805.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,972.76 : 136,292.88 = 65,950.76 : x
  2. Step 2: Convert to fraction form
    90,972.76/136,292.88 = 65,950.76/x
  3. Step 3: Cross multiply
    90,972.76x = 136,292.88 × 65,950.76
  4. Step 4: Simplify right side
    90,972.76x = 8,988,619,018.59
  5. Step 5: Solve for x
    x = 8,988,619,018.59/90,972.76
  6. Step 6: Final answer
    x = 98,805.61

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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.