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Finding the Fourth Proportional to 90,455.54, 124,713.94 and 64,644.94

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Solution

The fourth proportional to 90,455.54, 124,713.94 and 64,644.94 is: 89,128.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,455.54 : 124,713.94 = 64,644.94 : x
  2. Step 2: Convert to fraction form
    90,455.54/124,713.94 = 64,644.94/x
  3. Step 3: Cross multiply
    90,455.54x = 124,713.94 × 64,644.94
  4. Step 4: Simplify right side
    90,455.54x = 8,062,125,168.46
  5. Step 5: Solve for x
    x = 8,062,125,168.46/90,455.54
  6. Step 6: Final answer
    x = 89,128.04

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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.