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Finding the Fourth Proportional to 81,491.89, 112,458.45 and 45,681.91

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Solution

The fourth proportional to 81,491.89, 112,458.45 and 45,681.91 is: 63,040.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,491.89 : 112,458.45 = 45,681.91 : x
  2. Step 2: Convert to fraction form
    81,491.89/112,458.45 = 45,681.91/x
  3. Step 3: Cross multiply
    81,491.89x = 112,458.45 × 45,681.91
  4. Step 4: Simplify right side
    81,491.89x = 5,137,316,791.64
  5. Step 5: Solve for x
    x = 5,137,316,791.64/81,491.89
  6. Step 6: Final answer
    x = 63,040.84

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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.