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Finding the Fourth Proportional to 261,606, 392,412.70 and 74,617.50

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Solution

The fourth proportional to 261,606, 392,412.70 and 74,617.50 is: 111,927.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,606 : 392,412.70 = 74,617.50 : x
  2. Step 2: Convert to fraction form
    261,606/392,412.70 = 74,617.50/x
  3. Step 3: Cross multiply
    261,606x = 392,412.70 × 74,617.50
  4. Step 4: Simplify right side
    261,606x = 29,280,854,642.25
  5. Step 5: Solve for x
    x = 29,280,854,642.25/261,606
  6. Step 6: Final answer
    x = 111,927.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.