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Finding the Fourth Proportional to 90,523.60, 124,963.70 and 61,889.63

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Solution

The fourth proportional to 90,523.60, 124,963.70 and 61,889.63 is: 85,435.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,523.60 : 124,963.70 = 61,889.63 : x
  2. Step 2: Convert to fraction form
    90,523.60/124,963.70 = 61,889.63/x
  3. Step 3: Cross multiply
    90,523.60x = 124,963.70 × 61,889.63
  4. Step 4: Simplify right side
    90,523.60x = 7,733,956,222.16
  5. Step 5: Solve for x
    x = 7,733,956,222.16/90,523.60
  6. Step 6: Final answer
    x = 85,435.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.