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Finding the Fourth Proportional to 85,681.65, 118,240.68 and 47,955.90

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Solution

The fourth proportional to 85,681.65, 118,240.68 and 47,955.90 is: 66,179.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,681.65 : 118,240.68 = 47,955.90 : x
  2. Step 2: Convert to fraction form
    85,681.65/118,240.68 = 47,955.90/x
  3. Step 3: Cross multiply
    85,681.65x = 118,240.68 × 47,955.90
  4. Step 4: Simplify right side
    85,681.65x = 5,670,338,226.01
  5. Step 5: Solve for x
    x = 5,670,338,226.01/85,681.65
  6. Step 6: Final answer
    x = 66,179.14

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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.