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Finding the Fourth Proportional to 90,968.68, 125,535.95 and 50,681.71

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Solution

The fourth proportional to 90,968.68, 125,535.95 and 50,681.71 is: 69,940.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,968.68 : 125,535.95 = 50,681.71 : x
  2. Step 2: Convert to fraction form
    90,968.68/125,535.95 = 50,681.71/x
  3. Step 3: Cross multiply
    90,968.68x = 125,535.95 × 50,681.71
  4. Step 4: Simplify right side
    90,968.68x = 6,362,376,045.23
  5. Step 5: Solve for x
    x = 6,362,376,045.23/90,968.68
  6. Step 6: Final answer
    x = 69,940.29

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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.