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Finding the Fourth Proportional to 90,993.64, 136,638.62 and 56,154.76

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Solution

The fourth proportional to 90,993.64, 136,638.62 and 56,154.76 is: 84,323.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,993.64 : 136,638.62 = 56,154.76 : x
  2. Step 2: Convert to fraction form
    90,993.64/136,638.62 = 56,154.76/x
  3. Step 3: Cross multiply
    90,993.64x = 136,638.62 × 56,154.76
  4. Step 4: Simplify right side
    90,993.64x = 7,672,908,912.83
  5. Step 5: Solve for x
    x = 7,672,908,912.83/90,993.64
  6. Step 6: Final answer
    x = 84,323.57

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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.