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Finding the Fourth Proportional to 81,322.80, 112,225.88 and 45,512.76

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Solution

The fourth proportional to 81,322.80, 112,225.88 and 45,512.76 is: 62,807.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,322.80 : 112,225.88 = 45,512.76 : x
  2. Step 2: Convert to fraction form
    81,322.80/112,225.88 = 45,512.76/x
  3. Step 3: Cross multiply
    81,322.80x = 112,225.88 × 45,512.76
  4. Step 4: Simplify right side
    81,322.80x = 5,107,709,542.23
  5. Step 5: Solve for x
    x = 5,107,709,542.23/81,322.80
  6. Step 6: Final answer
    x = 62,807.84

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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.