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Finding the Fourth Proportional to 90,691.80, 136,037.70 and 62,698.20

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Solution

The fourth proportional to 90,691.80, 136,037.70 and 62,698.20 is: 94,047.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,691.80 : 136,037.70 = 62,698.20 : x
  2. Step 2: Convert to fraction form
    90,691.80/136,037.70 = 62,698.20/x
  3. Step 3: Cross multiply
    90,691.80x = 136,037.70 × 62,698.20
  4. Step 4: Simplify right side
    90,691.80x = 8,529,318,922.14
  5. Step 5: Solve for x
    x = 8,529,318,922.14/90,691.80
  6. Step 6: Final answer
    x = 94,047.30

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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.