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Finding the Fourth Proportional to 60,310.64, 90,474.16 and 20,857.16

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Solution

The fourth proportional to 60,310.64, 90,474.16 and 20,857.16 is: 31,288.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,310.64 : 90,474.16 = 20,857.16 : x
  2. Step 2: Convert to fraction form
    60,310.64/90,474.16 = 20,857.16/x
  3. Step 3: Cross multiply
    60,310.64x = 90,474.16 × 20,857.16
  4. Step 4: Simplify right side
    60,310.64x = 1,887,034,030.99
  5. Step 5: Solve for x
    x = 1,887,034,030.99/60,310.64
  6. Step 6: Final answer
    x = 31,288.58

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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.