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Finding the Fourth Proportional to 90,522.63, 134,827.67 and 85,780.28

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Solution

The fourth proportional to 90,522.63, 134,827.67 and 85,780.28 is: 127,764.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,522.63 : 134,827.67 = 85,780.28 : x
  2. Step 2: Convert to fraction form
    90,522.63/134,827.67 = 85,780.28/x
  3. Step 3: Cross multiply
    90,522.63x = 134,827.67 × 85,780.28
  4. Step 4: Simplify right side
    90,522.63x = 11,565,555,835.87
  5. Step 5: Solve for x
    x = 11,565,555,835.87/90,522.63
  6. Step 6: Final answer
    x = 127,764.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.