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Finding the Fourth Proportional to 81,511.95, 112,491.14 and 45,700.23

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Solution

The fourth proportional to 81,511.95, 112,491.14 and 45,700.23 is: 63,068.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,511.95 : 112,491.14 = 45,700.23 : x
  2. Step 2: Convert to fraction form
    81,511.95/112,491.14 = 45,700.23/x
  3. Step 3: Cross multiply
    81,511.95x = 112,491.14 × 45,700.23
  4. Step 4: Simplify right side
    81,511.95x = 5,140,870,742.46
  5. Step 5: Solve for x
    x = 5,140,870,742.46/81,511.95
  6. Step 6: Final answer
    x = 63,068.92

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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.