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Finding the Fourth Proportional to 66,391.12, 90,901.44 and 66,157.84

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Solution

The fourth proportional to 66,391.12, 90,901.44 and 66,157.84 is: 90,582.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,391.12 : 90,901.44 = 66,157.84 : x
  2. Step 2: Convert to fraction form
    66,391.12/90,901.44 = 66,157.84/x
  3. Step 3: Cross multiply
    66,391.12x = 90,901.44 × 66,157.84
  4. Step 4: Simplify right side
    66,391.12x = 6,013,842,923.29
  5. Step 5: Solve for x
    x = 6,013,842,923.29/66,391.12
  6. Step 6: Final answer
    x = 90,582.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.