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Finding the Fourth Proportional to 56,295, 77,687.10 and 31,146.12

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Solution

The fourth proportional to 56,295, 77,687.10 and 31,146.12 is: 42,981.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,295 : 77,687.10 = 31,146.12 : x
  2. Step 2: Convert to fraction form
    56,295/77,687.10 = 31,146.12/x
  3. Step 3: Cross multiply
    56,295x = 77,687.10 × 31,146.12
  4. Step 4: Simplify right side
    56,295x = 2,419,651,739.05
  5. Step 5: Solve for x
    x = 2,419,651,739.05/56,295
  6. Step 6: Final answer
    x = 42,981.65

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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.