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Finding the Fourth Proportional to 81,488.80, 112,461.48 and 45,685.74

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Solution

The fourth proportional to 81,488.80, 112,461.48 and 45,685.74 is: 63,050.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,488.80 : 112,461.48 = 45,685.74 : x
  2. Step 2: Convert to fraction form
    81,488.80/112,461.48 = 45,685.74/x
  3. Step 3: Cross multiply
    81,488.80x = 112,461.48 × 45,685.74
  4. Step 4: Simplify right side
    81,488.80x = 5,137,885,935.30
  5. Step 5: Solve for x
    x = 5,137,885,935.30/81,488.80
  6. Step 6: Final answer
    x = 63,050.21

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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.